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:''Dates use the day of the [[Cylon Holocaust]] as a baseline. See also [[Survivor Count]], [[History of the Twelve Colonies]].''
{{timeline series}}


==Ancient History==
This article plots the events which were shown or mentioned in the history of [[The Twelve Colonies of Kobol|the Twelve Colonies]] from the [[Re-imagined Series]] and [[Caprica (series)|Caprica]].
*'''-3600 Years:''' [[Pythia]] records her prophecies.
*'''-2000 Years:''' The thirteen tribes leave [[Kobol]]: twelve for the [[Cyrannus System]], the other for [[Earth]].


==Recent Colonial History==
By convention, all dates are relative to the [[Fall of the Twelve Colonies]]. Events before the Fall are marked as "BCH," or "Before Cylon holocaust". Given the few and somewhat contradictory dates about the Colonials' ancient history and the exodus from Kobol, that part of the timeline is speculative.
*'''-60 Years:''' [[Third Colonial Conflict]].
*'''-52 Years:''' Cylon revolt begins the [[Cylon War]]. [[Articles of Colonization]] signed ([[Colonial Day]], [http://blog.scifi.com/battlestar/archives/2005/04/index.html#a000025 RDM, April 11, 2005]).
*'''-51 Years''' Colonials suffer a major defeat when the Colonial ship ''[[Brenik]]'' is lost after a boarding action by Cylon Centurions, which resulted in some of the bloodiest, hand-to-hand fighting of the war.  A young Petty Officer [[Saul Tigh]] is one of a handful of survivors.
*'''-50 Years:'''
** [[Battlestar]] ''[[Galactica]]'' enters service under Commander [[Nash]].
*'''c. -41 years:''' [[William Adama]] begins his service in the Colonial Fleet as a Viper pilot, near the end of the Cylon War.
*'''-40 Years:''' Armistice between the Colonials and the Cylons ends the [[Cylon War]].
*'''-20 Years:'''
**Last significant [[FTL|Jump]] recorded on battlestar ''[[Galactica]]'s'' logs.
**[[Tom Zarek]] imprisoned for blowing up a government building on [[The Twelve Colonies (RDM)#Sagittaron|Sagittaron]] ([[Bastille Day]]).
**[[William Adama]] and [[Saul Tigh]] first meet ([[Scattered]], podcast).
**[[Laura Roslin]] begins her career in politics ([[Litmus]]). 
*'''-7 Years:''' [[Saul Tigh|Saul]] and [[Ellen Tigh]] marry. ([[Kobol's Last Gleaming, Part I]], [http://www.scifi.com/battlestar/episodes/season01/112/deleted1.html deleted scene])
*'''-6 Years:''' [[Sky King Disaster]].
*'''-5 Years:'''
**[[Laura Roslin]]'s last breast exam prior to her cancer diagnosis ([[Act of Contrition]]).
**[[Galen Tyrol]] assigned to ''Galactica'' ([[Litmus]]).
*'''-3 Years:''' [[Felix Gaeta]] assigned to ''Galactica''.
*'''-2 Years:'''
**[[Caprica Six]] begins residence on Caprica ([[Downloaded]]), first encounters Dr. [[Gaius Baltar]] ([[Miniseries]]).
**[[Sharon Valerii (Galactica copy)|A copy of Sharon Valerii]] begins serving aboard ''Galactica'' ([[The Farm]]).
**[[Zak Adama]] dies in a flight school accident. His funeral is Lee and William Adama's last meeting until the miniseries.
**Lt. [[Kara Thrace]] is re-assigned from Flight School to Battlestar ''Galactica'' ([[Act of Contrition]]).
*'''-1 Year:''' Last time [[William Adama]] and [[Caroline Adama]] speak.
*'''-Several months''' [[Caroline Adama]] gets engaged.
*'''-3 Weeks:''' [[Anastasia Dualla]] last visits her home.
*'''Zero Hour:''' Cylons [[Fall of the Twelve Colonies|destroy]] the [[The Twelve Colonies (RDM)|Twelve Colonies]]. The (so-far-known) only known survivors are a rag-tag fugitive fleet escorted by ''Galactica''; ''Pegasus'', which was another [[Pegasus (RDM)|isolated battlestar]]; a fleet of 15 civilian FTL capable ships; and the [[Resistance (movement)|resistance]] on [[The Twelve Colonies (RDM)#Caprica|Caprica]].  Events of the [[Miniseries]].


==Season 1==
The Cylon holocaust occurs more than 150,000 years ago.
*'''Note:''' Timeline assumes that the days shown on [[Caprica]] with [[Helo]] corresponds to the timeline on Galactica.  A strong example of this is in the season 1 finale "[[Kobol's Last Gleaming, Part II]]", when [[Kara Thrace|Starbuck]] travels from Galactica to Caprica.''


*'''1 Day:''' [[Battle of Ragnar Anchorage]]. ''Galactica's'' fleet leaves [[Cyrannus]] System.
==Ancient History==
*'''6 Days:''' ''Galactica'' finally loses the Cylon pursuers. Events of episode "[[33]]".
:''See also: [[History of the Twelve Colonies]], [[Sacred_Scrolls#Analysis|Sacred Scrolls]]''
*'''7 Days:'''
*'''Unspecified time period:''' Humans on the planet {{RDM|Kobol}} organize themselves into twelve tribes {{TRS|Miniseries}}. According to [[Sacred Scrolls|at least one scripture]], they "live in utopia with the gods." The humans become sufficiently advanced to establish viable space travel and artificial, robotic life. Artificial life-forms, machines similar in nature to the later day Cylons, are created by the humans. A war against the machines occurs. At one point the machines evolve and take humanoid form, either before, during or after the war. This group of humanoid Cylons are later referred to in the Sacred Scrolls as the "[[Thirteenth Tribe (RDM)|Thirteenth Tribe]]," although said text does not specify that they were a tribe of Cylons {{TRS|Sometimes a Great Notion}}.  
**First new child born on the ''[[Rising Star]]''.
*'''Over 17,000 years BCH:''' A supernova creates the [[Ionian nebula]].
**''Pegasus'' encounters a fleet of 15 civilian ships, including ''[[Scylla]]''.
*'''ca. 4,000 years BCH:''' The Thirteenth Tribe reportedly leaves Kobol and builds the [[The Temple of Five|Temple of Hopes]] on [[Algae planet|another planet]] <ref name="kobol">Tyrol says that "Our initial radiocarbon dating suggests that the temple's at least 4,000 years old, which lines up with the exodus of the Thirteenth Tribe." {{TRS|The Eye of Jupiter}}. This is the oldest date noted in the series's timeline, but also conflicts with the prior date of Pythia and her works as described by [[Elosha]] in "[[Kobol's Last Gleaming, Part I]]," where she states that the exodus of '''all 13 tribes''' occurred approximately 2,000 years ago.</ref>  This contradicts [[Ellen Tigh]]'s statement that the temple was built 3,000 years ago {{TRS|No Exit}}. They pray for guidance and are shown the way to [[Earth (RDM)|Earth]], the planet they colonize.
*'''10 Days:''' Events of episode "[[Water]]"
*'''ca. 3,600 years BCH:''' [[Pythia]] records [[Sacred Scrolls#The Book of Pythia|her prophecies.]] Aside from reports of the landing on Earth and drawings of [[Temple of Aurora|temple]]s there, this book describes "the exile and rebirth of the human race" and a "dying leader" not making it to a "promised land," though how long before her writings that such events took place is not revealed.
*'''12 Days:''' Tom Zarek engineers the capture of the ''[[Astral Queen]]'' by its prisoner crew. Events of episode "[[Bastille Day]]".  
*'''ca. 3,000 years BCH:''' A [[Lion's Head beacon|beacon]] is left at the [[Lion's Head Nebula]], later marking the way to Earth. At some undated point, someone travels from [[Earth (RDM)|Earth]] to Kobol, passing on information about Earth, including a map of its night sky <ref>Adama says that "According to Cottle, the [[Lymphocytic encephalitis|virus]] was an exact match to one reported over 3000 years ago, right around the time that the 13th colony left Kobol" {{TRS|A Measure of Salvation}}. This contradicts the two other dates of 2,000 and 4,000 years. While the dating is uncertain, it is the only clue to the beacon's age. That someone traveled back to Kobol is speculation, but an explanation for how Earth's sky could be displayed there. If true, it is still unknown on which of these two voyages the beacon was left behind.</ref>
*'''14 Days:''' Events of episode "[[Act of Contrition]]". [[Skirmish over the Red Moon|Starbuck is missing after a Cylon fight]].
*'''ca. 3,000 years to 2,000 years BCH:''' The humanoid Cylons of the Thirteenth Tribe prosper and begin to reproduce sexually. The technology of "[[Resurrection (RDM)|organic memory transfer]]," or downloading, is abandoned.
*'''15 Days:''' Events of episode "[[You Can't Go Home Again]]"
**The Thirteenth Tribe produce their own mechanical Centurions to act as laborers for their civilization.
*'''17 Days:''' Events of episode "[[Litmus]]"
*'''ca. 2,000 years BCH:''' (''The order of events on Kobol and Earth is uncertain.'')
*'''21 Days:''' First recollection by any of the ''[[Rising Star (RDM)|Rising Star]]'' crewmembers of giving [[Ellen Tigh]] medical assistance ("about a week" before "[[Tigh Me Up, Tigh Me Down]]").
**[[Samuel Anders]], [[Tory Foster]], [[Ellen Tigh]], [[Saul Tigh]], and [[Galen Tyrol]], later collectively known as the "Final Five," are born on Earth.
*'''24 Days:''' [[Sharon Valerii (Caprica copy)|Caprica Valerii]] and [[Karl Agathon|Helo]] first make love. Events of episode "[[Six Degrees of Separation]]"
**The Final Five work together in a research lab attempting to re-develop downloading technology.  The effort is spearheaded by Galen Tyrol and Ellen Tigh.
*'''25 Days:''' Events of episode "[[Flesh and Bone]]"
**All five Cylons receive visions of beings nobody else can see warning them of an impending rebellion by Earth's Centurion population.  The Final Five prepare a resurrection ship and leave it in orbit.
*'''26 Days:''' Ellen Tigh resumes consciousness ("a couple of days" before [[Tigh Me Up, Tigh Me Down]]).
**The remaining Twelve Tribes leave Kobol and settle the [[Twelve Colonies of Kobol|Twelve Colonies]]<ref name="kobol"/>.
*'''28 Days:''' Events of episode "[[Tigh Me Up, Tigh Me Down]]".
**Lord of Kobol "Athena" kills herself in despair over this. A [[Tomb of Athena|tomb]] is built for her containing a 3-D projection showing Earth and its Zodiac.  The projection is activated by the Arrow of Apollo, which travels with the twelve tribes.
*'''36 Days:''' [[Battle for the Tylium Asteroid]]. Caprica Valerii is pregnant and suffering morning sickness. Events of episode "[[The Hand of God (RDM)|The Hand of God]]".
**The Centurion uprising occurs and the Thirteenth Tribe exterminates itself in a nuclear holocaust.  Earth is left a nuclear wasteland.  The Final Five die in the attack, and are resurrected on board their orbiting ship.
**The Final Five begin a journey back to Kobol to find the other twelve tribes and inform them of Earth's fate. They are aware of the cyclical nature of history and believe that the twelve tribes will create Cylons again. They want to warn them to treat them right.  However, their ship is not equipped with a conventional FTL drive and journeys at relativistic sublight speeds.
*'''2,000 years to 52 years BCH:''' The Twelve Colonies grow and prosper. Each colony acts as a sovereign nation, complete with inter-colonial wars.
**The Final Five stop  at the Temple of Hopes as they retrace their tribe's path.
**The Final Five arrive at Kobol, finding the planet abandoned.  They continue on in pursuit of the twelve tribes, heading toward the colonies.


==Recent Colonial History==


===[[Colonial Day]]===
''The most recent history could also be dated using the [[Colonial calendar#The Calendar from Caprica|calendar from ''Caprica'']], but the method was not used in the re-imagined series and remained in the background even on the new show. Furthermore, it is not known whether the calendar is specific to the planet Caprica or common to the twelve worlds.
 
*'''Day 46:''' Delegates selected for the [[Quorum of Twelve]].  [[Tom Zarek]] selected to represent [[The Twelve Colonies (RDM)#Sagittaron|Sagittaron]]. Roslin implores Adama to permit his participation. [[Valance]] prepares to smuggle a ceramic stealth gun into the ''[[Cloud Nine]]''. Zarek addresses the fleet from the prison ship [[Astral Queen]]. Gaius Baltar selected to represent [[The Twelve Colonies (RDM)#Caprica|Caprica]]. Apollo and Starbuck inspect the [[Cloud Nine]].
 
*'''Day 47 - Morning:''' Colonial Day. Delegates arrive on Cloud Nine. Roslin addresses the Quorum. Baltar eyes [[Playa Palacios]]. Zarek moves to elect a vice president and is nominated by [[Marshall Bagott]]. Motion passes, chair to remain open 72 hours for nominations.
 
*'''Day 47 - Afternoon:''' Roslin asks [[Wallace Gray]] to run for the vice presidency. Zarek expounds on his reform agenda. Valence scuffles with Apollo and Starbuck and is jailed. Helo and Caprica Valerii arrive at a spaceport in the vicinity of [[Delphi]].
 
*'''Day 47 - Evening:''' Starbuck and Apollo interrogate Valence to no effect.
 
*'''Day 48 - Morning:''' Grey addresses the Quorum. [[Safiya Sanne]] changes [[The Twelve Colonies (RDM)#Picon|Picon]]'s vote to Zarek, bringing his total to 5 of 12.
 
*'''Day 48 - Afternoon:''' Zarek serves [[Ellen Tigh]] a drink and inquires after the whereabouts of Valence. Baltar interviewed by [[James McManus]]. Valence found dead. Tigh, Apollo and Starbuck consult with Roslin on security.
 
*'''Day 48 - Evening:''' Roslin travels to ''Cloud Nine'' and asks Grey to drop out of the race and recruits Baltar to replace him, interrupting his "exclusive" with Palacios. Apollo and Starbuck flirt in the bunk on ''[[Galactica]]''.
 
*'''Day 49 - Morning:''' Baltar elected Vice President, with Roslin casting the tie-breaking vote.
 
*'''Day 49 - Evening:''' Victory party for Baltar. Roslin dances with Adama, Ellen with Saul Tigh, Billy with Dualla, Starbuck with Apollo and Baltar.
 
*'''Day 49 - Night:''' Helo and Caprica Valerii infiltrate the spaceport. Helo discovers Valerii is a Cylon and flees.
 
''Note: Roslin states that the chair will remain open for nominations for 72 hours on the morning of Day 47, but the [[Kobol's Last Gleaming, Part II|next episode]] clearly takes place the day after the victory party, and is stated to take place on Day 50. Perhaps the Quorum moved to close the nomination period early after the nomination of a strong candidate.''
 
===[[Kobol's Last Gleaming, Part I]]===
*'''Day 50 - Early Morning:''' Apollo and Adama spar. Baltar and Starbuck have sex. Caprica Valerii catches up with Helo at [[Delphi]], and he shoots her. ''Galactica'' Boomer contemplates suicide. [[Cottle]] examines Roslin and gives her "six months, at the outside".
 
*'''Day 50 - Morning:''' Starbuck and an (already) drunken Baltar exchange innuendos over the officer's card game.
 
*'''Day 50 - Afternoon:''' Roslin briefs Baltar on her economic agenda. [[Number Six|Six]] warns him that "it's not safe to remain on ''Galactica''". ''Galactica'' Boomer and Crashdown stumble upon [[Kobol]]. Helo holds Caprica Valerii at gunpoint. Apollo and Starbuck exchange blows.
 
*'''Day 50 - Evening:''' Roslin examines an orbital photograph of Kobol and has a vision of the [[City of the Gods]]. Adama decides to send an expedition, which Baltar demands to accompany. ''Galactica'' Boomer shoots herself on Baltar's advice. In private, Roslin unsuccessfully petitions Commander Adama to send the Cylon Raider after the [[Arrow of Apollo]] on [[The Twelve Colonies (RDM)#Caprica|Caprica]].
 
*'''Day 50 - Night:''' [[Battle of Kobol]] begins. Scout party ambushed by a [[Cylon Basestar]] at Kobol. Starbuck devises a plan to deliver a nuke to the [[Basestar (RDM)|basestar]] using the captured [[Cylon Raider|Raider]] and [[Cylon Transponder]]. Roslin convinces her to purloin the Raider and take it to Caprica instead.
 
===[[Kobol's Last Gleaming, Part II]]===
*'''Day 51 - Early Morning:''' Survivors of [[Raptor 1]] escape the wreck. Baltar passes out. Adama terminates Roslin's presidency. Apollo and Tigh plan an assault on ''[[Colonial One]]''. Adama dispatches the wounded Boomer to take out the basestar. Caprica Valerii leads Helo to [[Delphi Museum of the Colonies]].
 
*'''Day 51 - Morning:''' Starbuck arrives at Caprica, retrieves the [[Arrow of Apollo]], kills a copy of [[Number Six|Six]] and meets up with Helo. ''Galactica's'' [[Marines|marines]] board ''[[Colonial One]]''. Apollo mutinies, Roslin stands down. Baltar has a vision of the shape of things to come. ''Galactica'' Boomer confronts other Valerii copies on the basestar. She returns from her mission and shoots Commander Adama.
 
==Season 2.0==
''Note: Season 2 dates are rough guesses, at best, and are complicated by the [[season two timeline discontinuity]]. Dates for the first half of the season are based off of the last dates given at the end of season one.
 
===[[Scattered]]===
*'''Day 51 - Morning:''' A [[Cylon Basestar]] ambushes the fleet, which jumps to an [[Emergency Jump Coordinates| emergency rendezvous point]]. ''Galactica'' jumps to wrong coordinates and is forced to backtrack. [[Battle of Kobol#Scattering of the Fleet|''Galactica'' holds off basestar]] and returns to bulk of the Fleet.
 
===[[Valley of Darkness]]===
*'''Day 51 - Morning:''' ''Galactica'' is partially disabled by a Cylon [[Virus|virus]] while a [[Cylon Centurion]] boarding party attempts to [[Battle of Kobol#Cylon Boarding|commandeer the ship]].
 
===[[Fragged]]===
*'''Day 51 - Afternoon:''' [[Crashdown]] is shot by [[Gaius Baltar]] on Kobol after threatening to shoot [[Cally]].
 
===[[Resistance]]===
*'''Day 52:''' Tigh interrogates Tyrol and imprisons him with [[Sharon Valerii (Galactica copy)]].
 
*'''Day 53 - Morning:''' [[Cally]] blackmails Baltar into running his Cylon test on Tyrol. Baltar notes to Tigh that he should assume Roslin's duties; he invites Baltar to join her in the brig. ''[[Aturian]]'' stops refining Tylium in protest of Martial law. Apollo briefs pilots in the ready room. Dualla checks out his ass. On Caprica, Starbuck and Helo meet [[Samuel Anders]]'s [[Resistance (movement)|Resistance]].
 
*'''Day 53 - Afternoon:''' Tigh deploys troops to vessels refusing to supply ''Galactica''. The [[Gideon]] Massacre takes place. Roslin is chagrined. Apollo initiates his escape plan.
 
*'''Day 53 - Evening:''' Saul and Ellen Tigh argue and have sex. Baltar poisons Tyrol and interrogates Boomer. Starbuck and Helo arrive at the Resistance HQ with Anders.
 
*'''Day 54 - Morning:''' Apollo delivers briefing, orchestrates Roslin's escape. The deck gang begin construction of a new brig cell for [[Cylon agent|Cylon agents]].
 
*'''Day 54 - Afternoon:''' Apollo & co. disembark at the [[Cloud Nine]] and link up with [[Tom Zarek]]. Starbuck and Anders flirt.
 
*'''Day 54 - Evening:''' Commander Adama wakes up. Cally kills ''Galactica'' Boomer.
 
===[[The Farm]]===
*'''Day 61:''' - Laura Roslin & co. take refuge on ''[[Kimba Huta]]''. William Adama resumes command of ''Galactica''.
 
===[[Home, Part I]]===
*'''Day ?? - Morning:''' Kara Thrace's captured [[Cylon Heavy Raider|Heavy Raider]] jumps into orbit around Kobol.  Tom Zarek attempts to have it shot down because it's not the same Raider that Thrace departed in.  Thrace lands her Heavy Raider aboard the ''[[Astral Queen]]'' and is reunited with President Roslin and Lee Adama.  Lee learns that in addtion to Karl Agathon, Thrace brought back the Caprican copy of Sharon Valerii, whereupon Lee pulls a gun on Sharon.  After defusing the situation with words, Roslin orders Valerii thrown out the airlock, but relents and has her thrown into the brig instead, after hearing both Thrace and Agathon's protest.  Commander Adama promotes Captain [[George Birch]] to be the new ''Galactica'' CAG.
 
*'''Day ?? - Afternoon:''' Commander Adama holds a press conference regarding the escape of President Roslin from his custody and the ensuing martial law.  Adama adjourns the press conference when the questions become increasingly pointed.
 
*'''Day ??+1 - Morning:''' Cpt. Birch on his first mission as CAG is responsible for an accident that nearly kills [[Kat]].  Zarek and his trusted lieutenant [[Meier]] plot to overthrow Roslin and take command of the fleet.
 
*'''Day ??+1 - Afternoon:''' Cpt. Birch oversees his second flight mishap as CAG when two ships he's supposed to be guiding collide with one another during a routine refueling operation.
 
*'''Day ??+2 - Morning:''' Roslin's party, made up of Thrace, Cpt. Adama, Elosha, Zarek, Meier, Agathon, Boomer, two Zarek red-shirts, two Roslin red-shirts and Rolsin herself land on Kobol.  Using Valerii as their guide they set out in search of the [[Tomb of Athena]].
 
*'''Day ??+2 - Afternoon:'''  The party is ambushed by Cylon Centurions after Elosha accidentally trips a "bouncing betty" land mine and it blows up in her face, killing her.  The surviving party is saved when Valerii uses an RPG launcher to destroy the last remaining Centurion.
 
*'''Day ??+2 - Evening:''' Adama makes the decision to put the fleet back together after a long and heartfelt talk with [[Dee]].
 
===[[Home, Part II]]===
*'''Day ??:''' - [[Raptor 1]] lands on Kobol with [[William Adama]] and his contingent.  [[Tomb of Athena]] found.
*'''Day ??:''' - Roslin reestablished as lawful President; martial law ends. Fleet reunification.
 
===[[Final Cut]]===
*'''Day ??''' [[D'anna Biers]] produces a documentary aboard the Galactica about the "[[Gideon massacre]]".  It is a generally positive documentary broadcast to the fleet.  Unknown to the fleet, it is also surveillance by the Cylons into the status of the Colonial fleet.
 
===[[Flight of the Phoenix]]===
*'''Day 84''' - Laura Roslin is given a few weeks, a month at the most to live. [[Cally]] is released from the brig; a welcome back party is thrown for her by the deck crew.
*'''Day ??''' - [[Chief Tyrol]] begins construction of the [[Blackbird]] prototype stealth fighter.
*'''Day ??''' - [[Great Cylon Turkey Shoot|''Galactica'' routs hundreds of Cylon fighters]] without a casualty while dispatching a [[Logic bomb]] from their ship computers. 
*'''Day ??''' - The [[Blackbird]] prototype stealth fighter is completed by [[Chief Tyrol]] and a team of Galactica crewmembers.  Lt. Thrace flies it on its first test flight, quickly proving its value as a stealth craft.
 
===[[Pegasus (episode)|Pegasus]]===
*'''Day ??''' - ''Galactica'' encounters battlestar ''[[Pegasus (RDM)|Pegasus]]''. Admiral [[Helena Cain]] assumes fleet command.
*'''Day ??'''- [[Galen Tyrol|Tyrol]] accidentally kills ''Pegasus'' Lieutenant [[Alistair Thorne|Thorne]] and is arrested with [[Karl Agathon|Helo]].
*'''Day ??''' - A standoff between the two battlestars begins over the treatment of the arrested ''Galactica'' crew.
 
==Season two timeline discontinuity==
:''Main article: [[Season two timeline discontinuity]]''
Based on various evidence, the end of "Resistance" can be very firmly dated to Day 54. This puts Cally's release at Day 84, and in turn means that as of "Flight of the Phoenix", Roslin was not expected to live past day 114. Corroborating this, Sharon Valerii does not appear visibly pregnant in "Pegasus".
 
However, in the following episode, Admiral Cain states offhandedly that it has been about six months since the fall of the colonies. This is further corroborated in "Epiphanies", which we learn takes place 189 days after the holocaust (a full 75 days longer than Roslin's most favorable prognosis). Additionally, Valerii now appears to be well into her second trimester, and elections have been put off by 75 days from their first-season projections.
 
There is apparently no way to reconcile this discrepancy. Even under the most liberal assumptions, the first half of the second season timeline cannot accommodate more than about three additional days.


Consequently, there is a 75-day discontinuity between the fist and second halves of season two. The second half of the season is dated from the firm dates given in "Resurrection Ship, Part I" and "Epiphanies", but be aware that dates throughout the remainder of season 2 are likely to contradict those from earlier in the series.
*'''At least 200 years BCH:''' Humans develop an immunity to the virus causing [[Lymphocytic encephalitis]] {{TRS|A Measure of Salvation}}. <ref>Doctor Cottle notes the time as "a couple hundred years ago," which is an indeterminate amount of time, but likely less than four or five hundred years.</ref>
*'''ca. 93 BCH:''' [[Tauron Civil War]] causes emigration of [[Joseph Adama|Joseph]] and [[Sam Adama]] to {{RDM|Caprica}} to live in an orphanage. Joseph later becomes a lawyer thanks to the education funded by the [[Ha'la'tha]] crime syndicate; Sam becomes an assassin for Ha'la'tha {{CAP|Pilot (Caprica)}}.
*'''69 years BCH:'''
**[[Saul Tigh]] supposedly born (defined by deleted scene in "[[Valley of Darkness]]" concerning the ''[[Brenik]]''). This is actually a fabrication by [[John Cavil]].  


==Season 2.5==
===First Cylon War===
===[[Resurrection Ship, Part I]]===
:''See [[Timeline - Caprica (RDM)]]''
*'''Day ~175''' - The standoff between the two battlestars ends in an uneasy truce, and a tense summit aboard Colonial One, after Lt. Thrace returns from an unauthorized surveillance mission to the Cylon fleet, where she gains critical evidence on a Cylon ship.  Dr. Baltar is able to determine from [[Gina]] that this is the [[Resurrection Ship]] that cylons need to resurrect so far from the Cylon homeworld.


===[[Resurrection Ship, Part II]]===
*'''58—52 years BCH:''' With the use of a meta-cognitive processor stolen from Tauron rival [[Tomas Vergis]], the Caprican tech CEO [[Daniel Graystone]] creates the first [[Cylons (RDM)|Cylons]] of the Twelve Colonies to aid in hard labor and warfare. A virtual copy of his dead monotheist daughter [[Zoe Graystone]]'s consciousness is downloaded into one {{CAP|Pilot (Caprica)}}. Humanity is unaware that they are repeating the actions of their ancestors on Kobol.
*'''Day ~177''' - The Battlestars Galactica and Pegasus together engage the Cylon fleet in the [[Battle of the Resurrection Ship]], where they achieve an overwhelming victory with relatively light casualties, destroying not only the Resurrection Ship, but at least one other Cylon base star. The Blackbird is destroyed in the battle, although Lee Adama manages to eject successfully. At least one Raptor is also lost in the battle. Admiral Cain is killed by Gina, after Baltar helps her escape captivity.  He then proceeds to hide her in the fleet.
*'''ca. 58 BCH:'''
**[[William Adama]] born in [[Qualai]], {{RDM|Caprica}} {{TRS|Hero}}. He is named for his deceased older brother {{CAP|Apotheosis}}.
*{{inlineref|52 BCH|52 years BCH}}:'''  
**Cylon revolt starts the first [[Cylon War]] {{TRS|Colonial Day}}.
**[[Articles of Colonization]] signed {{TRS|Colonial Day}}.<ref>From Ronald D. Moore's [http://blog.scifi.com/battlestar/archives/2005/04/index.html#a000025 scifi.com blog post] of April 11, 2005: "Colonial Day occurs every year and it is the anniversary of the founding of the "federal" system of government which was a relatively recent event. Before that time, the Colonies functioned more or less on their own, possibly with various attempts at alliances or even complete Colonial government over the centuries since the exodus from Kobol, none of which were successful. When the first Cylons were created, individual Colonies still warred against one another and it wasn't until the Cylon rebellion that the 12 Colonies finally came together in a permanent way. Presumably, the Articles of Colonization were not made up out of whole cloth, however, and there may well be principles and ideas of justice that date back to the original colonists."</ref>
*'''51 years BCH:''' Colonial ship ''[[Brenik]]'' is lost after a boarding action by [[Cylon Centurion Model 0005|Cylon Centurions]] ([[Valley of Darkness]], deleted scene).
*'''ca. 50 years BCH:''' Battlestar ''[[Galactica (TRS)|Galactica]]'' enters service.
*'''42 years BCH:'''
** William Adama begins his service in the Colonial Fleet as a [[Raptor]] pilot aboard ''[[Galactica (TRS)|Galactica]]'' with co-pilot and ECO [[Coker Fasjovik]], 10 years into the Cylon War ("Hero," ''[[Blood and Chrome]]''). He is later promoted to Lieutenant and is assigned his first Viper, a [[Mark III]], and a special task force comprised of top pilots for dangerous missions.
** Battlestar ''[[Archeron]]'' destroyed by Cylon forces in [[Sector 12]]. All hands lost {{TRS|Blood and Chrome}}.
** Battlestar ''[[Osiris]]'' destroyed over [[Djerba]] in suicide maneuver against lone Cylon Baseship. All hands lost. Fate of Lt. [[Jim Kirby]] (AWOL) unknown.
** [[Becca Kelly]] succeeds in her mission on Djerba, and is later killed by the Cylons. [[Ghost Fleet Offensive]] successful, decimating Cylon military holdings in five sectors.
** Mechanical Cylons begin experiments constructing humanoid forms of Cylon.
*'''42-41 years BCH''': [[Coker Fasjovik]] presumably musters out of Fleet after termination of second mandatory tour.
*'''40 years BCH:'''
**Experiments on "humanoid" Cylons culminate in the creation of the [[First Hybrid]] and subsequent [[Hybrid]]s, but no fully humanoid forms.
**The Final Five arrive in the Twelve Colonies in the waning days of the war.
**The Five meet the local Cylons and negotiate an end to the war.  They will give the Cylons biological bodies complete with resurrection technology if the Cylons agree to end the war.
**[[Operation Raptor Talon]] conducted by the Colonial Fleet, where William Adama flies his first official Viper mission. Battlestar ''[[Columbia (RDM)|Columbia]]'' destroyed {{TRS|Razor Flashbacks}}.
**Armistice ends the [[Cylon War]]. Cylons exile themselves from the Twelve Colonies {{TRS|Miniseries}}. The First Hybrid and his [[Cylon Centurion Model 0005#Guardians|Guardians]] part company with the other Cylons.
**William Adama musters out of the Colonial Fleet ("[[Scattered]]," [[Sources:Adama's Dossier|Adama's dossier]]).


===[[Epiphanies]]===
===Inter-War Period===
*'''Day 189''' - President Roslin near death; orders death of Cylon fetus.  A [[Demand Peace|Cylon peace movement]] begins to pose as a threat to [[The Fleet (RDM)|the Fleet]]. The Cylon fetus is eventually spared, when Dr. Baltar determines how to use Cylon fetal stem cells to treat Roslin's cancer.  Dr. Baltar smuggles the nuclear weapon that he was provided with for work on his Cylon detector to the Cylon peace movement aboard Cloud Nine.
*'''37 BCH:''' William Adama enlists as merchant marine and serves aboard inter-colony freighters ("Scattered," Adama's dossier).
*'''37 to ca. 30 BCH:'''
** The Cylons establish a secret base known as [[The Colony]], built around and connected with the original ship of the Final Five. This is the place where research and development equipment belonging to the Final Five is stored.
**The Final Five create [[John Cavil]], the first of the new humanoid Cylons that are their "children," and designate him model Number One. They raise him for some time.
**John matures and assists the Final Five in the creation of seven other humanoid Cylon models.  A resurrection system is built for the new models based on technology left over from the Thirteenth Tribe.
*'''ca. 30 BCH:'''
**Cavil murders model [[Number Seven]], Daniel, out of jealousy by poisoning the amniotic fluid in which the Seven copies were maturing. 
**The Final Five are murdered by Cavil and their consciousnesses are [[boxing|boxed]].
**Cavil erases all knowledge of the Final Five and the missing model Number Seven from his fellow humanoid Cylon models and specifically programs them not to think about either.
**[[Saul Tigh]] is resurrected and introduced to the colonies as a military officer with false history of fighting in the war.
** [[Ellen Tigh]] is resurrected and introduced into Colonial society sometime thereafter.
*'''ca. 28 BCH:'''
** [[Galen Tyrol]] supposedly born.<ref>At the time of the Cylon attack, Tyrol has "ten years experience" {{TRS|Miniseries}}, and has "served on battlestars since I was 18" {{TRS|Resistance (episode)}}. This puts his birth in approximately 28 BCH, allowing for a few years leeway with the first comment.</ref> This is actually a fabrication by [[John Cavil]].
** First meeting between William Adama and Saul Tigh ("Scattered," "[[Torn]]"). <ref>The podcast for "[[Scattered]]" places their meeting "twenty years ago". In "[[Torn]]," Adama states that he has known Tigh for 30 years. Furthermore, [[Sources:Adama's Dossier|Adama's dossier]] places his reinstatement into the Colonial Fleet at 23 BCH. ''Battlestar Wiki'' choses to use the more consistent dates.</ref>
*'''ca. 27 BCH:''' William and [[Carolanne Adama]] meet and marry. <ref name = "leezak">This date is assumed as follows: Zak died 2 BCH. Since he graduated from some kind of military academy, he would be at least 22 years old, following real world models. On a [[:Image:Youngadamafamily.jpg|photograph]] of William Adama with his sons, Lee seems to be about two years older than Zak. Adama and his wife probably met not long before Lee's birth.</ref>
*'''ca. 26 BCH:''' [[Lee Adama]] born. <ref name = "leezak"/>
*'''ca. 24 BCH:''' [[Zak Adama]] born. <ref name = "leezak"/>
*'''23 years BCH:''' William Adama reinstated in the Colonial Fleet at the rank of Captain and is assigned to the battlestar ''[[Universal]]'' <ref>[[:Image:William Adama's Reinstatement Letter.jpg|This information comes from a prop used in the episode "Scattered".]]</ref> ("Scattered" deleted scene, Adama's dossier).
*'''21 years BCH:''' Saul Tigh reinstated in the Colonial Fleet at the rank of Captain by now-Major Adama (Scattered). <ref>The time between Adama's and Tigh's reinstatement is not specified on screen. The February/March issue of ''Battlestar Galactica: The Official Magazine'' gives it as two years: "''Adama reenlisted with the service and Tigh spent two years drinking before Adama pulled strings to get him back into service.''"</ref> <ref>In actually, this is Saul Tigh's ''entrance'' into the Colonial Fleet, not his return, as he did not serve in the Cylon War and all documents of his service and retirement were forged by John Cavil.</ref>
*'''20 years BCH:'''
**Last significant [[FTL]] jump recorded in ''Galactica'''s logs (Miniseries).
**[[Tom Zarek]] imprisoned for blowing up a government building on [[Sagittaron]] {{TRS|Bastille Day}}.
*'''17 BCH:''' William Adama assigned to the battlestar ''[[Atlantia (RDM)|Atlantia]]'', where he makes his 1000th Viper landing (Adama's dossier, "[[Act of Contrition]]").
*'''13 years BCH:''' William Adama assigned as executive officer to the new battlestar ''[[Columbia (RDM)|Columbia]]'' (Adama's dossier).
*'''11 years BCH:''' [[Laura Roslin]] begins her career in politics {{TRS|Litmus}}.
*'''ca. 10 years BCH:''' Galen Tyrol enlists in the Colonial Fleet as a non-commissioned officer.<ref>At the time of the Cylon attack, Tyrol has "ten years experience" {{TRS|Miniseries}}. It is likely that Tyrol (and the two other remaining members of the Final Five, Samuel Anders and Tory Foster), was introduced into Colonial society at or around this point by [[John Cavil]] as part of his plan for revenge on his creators, human and Cylon alike {{TRS|No Exit}}.</ref>
*'''9 years BCH:''' William Adama promoted to commander and assigned as commander of the battlestar ''[[Valkyrie]]'' (Adama's dossier, "Hero").
*'''7 years BCH:''' Saul and [[Ellen Tigh]] meet and marry again, unaware that it is the second time ("[[Kobol's Last Gleaming, Part I]]," [[List of Deleted Scenes (RDM)#Kobol's Last Gleaming, Part I|deleted scene]]).
*{{inlineref|6 BCH|6 years BCH}}: William Adama leads an aborted covert intelligence mission aboard ''Valkyrie''. [[Daniel Novacek]] is shot down and captured by the Cylons. Adama and Tigh are subsequently assigned to ''Galactica'' (Adama's dossier, "Hero"). <ref name="hero">While dialogue from "[[Hero]]" places these events at 1 BCH, this contradicts previously established dates about the time Adama and others served on ''Galactica''. See [[Hero#Analysis]] for a detailed explanation why ''Battlestar Wiki'' chooses to treat this as a continuity error and change the date.</ref>
*'''5 years BCH:'''
**[[Laura Roslin]]'s last breast exam prior to her cancer diagnosis {{TRS|Act of Contrition}}.
**Galen Tyrol assigned to ''Galactica'' {{TRS|Litmus}}. <ref>Since Adama states that Tyrol has been under his commander for "over five years," this might also be one year earlier.</ref>
*'''4 years BCH:'''
**[[Kara Thrace]] graduates from the Colonial Fleet Academy {{TRS|Maelstrom}}.
**[[Socrata Thrace]] dies of stomach cancer (Maelstrom).
*'''3 years BCH:''' [[Felix Gaeta]] assigned to ''Galactica'' (Miniseries).
*{{inlineref|2 BCH|2 years BCH}}:
**[[Caprica-Six]] begins residence on Caprica {{TRS|Downloaded}}, first encounters Dr. [[Gaius Baltar]] (Miniseries).
**[[Sharon Valerii]] begins service aboard ''Galactica'' {{TRS|The Farm}}.
**Zak Adama dies in a flight school accident (Miniseries).
**Lt. [[Kara Thrace]] is re-assigned from flight school to ''Galactica'' {{TRS|Act of Contrition}}.
*'''1 Year BCH:'''
**Last time William and Carolanne Adama speak (Miniseries).
**Carolanne Adama gets engaged (Miniseries).
**[[Anastasia Dualla]] last visits her home {{TRS|Final Cut}}.
*'''Between 5 and 1 Year BCH:'''
**''The following events are all seen in "[[Daybreak, Part I]]" and "[[Daybreak, Part II|Part II]]" but are not dated.  However, they fall within this approximate time frame.''
**[[Laura Roslin]]'s father and sisters are killed by a drunk driver.
**[[Kara Thrace]] and [[Lee Adama]] first meet.
**[[Caprica-Six]] finds [[Julius Baltar]] a new home in a retirement center which encourages horticultural activities.
**[[William Adama]] ponders retirement at a security firm but rejects the job in disgust when forced to take a polygraph test.
***[[Saul Tigh|Saul]] and [[Ellen Tigh]] celebrate his (and their own) supposed retirement.
**[[Sharon Valerii]] nearly washes out of the Colonial Fleet, but is given a second chance by Commander Adama.  She promises to pay him back for his kindness.
**[[Laura Roslin]] joins [[Richard Adar]]'s presidential campaign.
**[[Gaius Baltar]] promises [[Caprica-Six]] full access to the Colonial Defense Mainframe if she helps him work on the [[Command Navigation Program]].


===[[Black Market]]===
== 1 ACH ==
*'''Day ???''' - Commander Fisk is murdered aboard the Battlestar Pegasus.  Lee Adama begins an investigation into the matter.
1 ACH (After Colonial Holocaust) denotes a period of 365 days, the epoch of which is the [[Fall of the Twelve Colonies]]. The events of this time period correspond to the majority of Season 1 and Season 2, in addition to:
*'''Day ???''' - Lee Adama kills [[Phelan]], leader of the [[Black market (organization)|Black Market]] crime syndicate.
*'''Day ???''' - Lee Adama is debriefed on the entire incident regarding the murder of Fisk and the Black Market.


===[[Scar]]===
=== Return of the [[Miniseries|Cylons]] ===
*'''Day ???''' - After 29 days in an asteroid field (putting us at Day 218 or later), the ''[[Majahual|Majahual's]]'' mining operation has produced enough raw materials for the construction of two new Viper squadrons using the fabrication facilities aboard the [[Pegasus (RDM)|Battlestar ''Pegasus'']]. Attacks on the operation continue by the ace Cylon raider known as [[Scar (Raider)|Scar]], making it the source of a heated competition between Lt. Katraine and Cpt. Thrace.
*{{inlineref|0 BCH|Zero Hour}}:
**The Cylon fleet gathers at a staging area close to [[The Colony]] {{TRS|The Plan}}.
**John Cavil makes his final preparations for the impending assault and visits a sealed-off resurrection chamber housing deactivated copies of the [[Final Five]] {{TRS|The Plan}}.
**The [[Armistice Station]] is destroyed by [[Cylons (RDM)|Cylon]] forces, appear, and show themselves, (albeit in a more advanced form, as well as a humanoid version) for the first time in 40 years {{TRS|Miniseries, Night 1}}.
**[[Laura Roslin]] is diagnosed with inoperable breast cancer {{TRS|Miniseries, Night 1}}.
**''[[Galactica (TRS)|Galactica]]'' is decommissioned {{TRS|The Plan|Miniseries, Night 1}}.
**''[[Pegasus (RDM)|Pegasus]]'' undergoes refit while [[Kendra Shaw]] is assigned to the ship from the [[Ministry of Defense]] {{TRS|Razor}}.
**A Cavil meets with [[Caprica-Six]], who gives him the access codes to the Colonial Defence Mainframe {{TRS|The Plan|Miniseries, Night 1}}.
**The Cylon strike force simultaneously jumps into orbit around all the Twelve Colonies and commences an all-out attack {{TRS|The Plan}}, using strategic nuclear bombardment {{TRS|Miniseries, Night 1}}.
**[[Picon (RDM)|Picon]] [[Fleet Headquarters]] is destroyed {{TRS|Miniseries, Night 1}}.
**[[Ellen Tigh]] is placed aboard Raptor from the medical ship ''[[Rising Star]]'' by [[John Cavil]] shortly before it escapes the destruction of Picon {{TRS|The Plan|Tigh Me Up, Tigh Me Down|No Exit}}.
**''Galactica''{{'|s}} last [[Viper Mark VII]] squadron is destroyed {{TRS|Miniseries, Night 1}}.
**A battle near [[Virgon (RDM)|Virgon]] ends with the total loss of the remaining Colonial Fleet including the flagship ''[[Atlantia (RDM)|Atlantia]]'' {{TRS|Miniseries, Night 1}}.
**The [[Mercury class battlestar|battlestar]] ''[[Pegasus (RDM)|Pegasus]]'' luckily escapes the destruction of the [[Scorpion Fleet Shipyards]] {{TRS|The Plan|Razor|Pegasus}}.
**The Cylons begin landing ground forces on the Colonies {{TRS|The Plan|33}}.
**''Galactica'' engages [[Cylon Raider (RDM)|Cylon Raider]]s and survives with moderate damage and 85 dead {{TRS|Miniseries, Night 1}}.
**Last transmission from the Colonies received by Laura Roslin aboard ''[[Colonial Heavy 798]]'' from a [[Jack|fellow secretary]] {{TRS|Miniseries, Night 1}}.
**[[Case Orange]] contingency mechanism assigns Roslin the office of the President of the Twelve Colonies {{TRS|Miniseries, Night 1}}.
**Roslin gathers stranded civilian and military ships in the vicinity of {{RDM|Caprica}} {{TRS|Miniseries, Night 1}}.
**Commander [[William Adama|Adama]] assumes overall Fleet command and orders regroup at [[Ragnar Anchorage]] {{TRS|Miniseries, Night 1}}.
**Roslin's fleet survives two Cylon attacks and meets at Ragnar {{TRS|Miniseries, Night 2}}.
**''Galactica'' changes from battle stance to civilian protection, and escorts the civilian fleet from Ragnar towards the [[Prolmar Sector]] {{TRS|Miniseries, Night 2}}.
**The Twelve Colonies of Kobol lie in irradiated ruins. Their military has been utterly defeated and their infrastructure has been crushed. The result of the engagement is a complete victory for the Cylon forces {{TRS|Miniseries, Night 2|The Plan}}.
**The Cylon occupation of the Colonies begins {{TRS|33|Downloaded|The Plan}}.


===[[Sacrifice]]===
=== Season 1 ===
*'''c. Day 210''' - Three men and a woman named [[Sesha Abinell]] lay siege to bar onboard [[Cloud 9]], taking the guests hostage, and sealing the area off from the rest of the ship.  Abinell's husband was killed aboard the ''[[Greenleaf]]'' when the [[Cylons (RDM)|Cylons]] attacked it ten weeks ago, and she decides to exact vengeance. Lee Adama is wounded as a result of a failed rescue attempt by [[Kara Thrace]]
:''See [[Timeline - Season 1 (RDM)]]''


''Backdated from "The Captain's Hand" and "Lay Down Your Burdens, Part I"''
=== Season 2 ===
:''See [[Timeline - Season 2 (RDM)]]''


===[[The Captain's Hand]]===
== 2 ACH to 3 ACH ==
*'''c. Day 236''' - [[Kara Thrace]] assigned to ''Pegasus'' as flight instructor.
The "one year time jump" depicted at the end of the {{TRS|Lay Down Your Burdens, Part II|prose=yes}} occurs during 2 ACH, beginning with the Cylon invasion of [[New Caprica]] as a result of [[Gina Inviere]]'s ''[[Cloud 9]]'' explosion, forcing the subsequent retreat of the last two [[Battlestar (RDM)|battlestars]], [[Galactica (TRS)|''Galactica'']] and [[Pegasus (RDM)|''Pegasus'']].
*'''Day ??''' - Almost one month after the events of "Sacrifice", [[Lee Adama]] has been promoted to Major and temporarily assigned to ''[[Pegasus (RDM)|Pegasus]]''. [[Rya Kibby]] arrives on ''Galactica'' seeking a clandestine abortion from Dr. [[Cottle]] and requests asylum.
*'''c. Day 240''' - ''Pegasus'' Commander [[Barry Garner]] dies during the [[Battle of the Binary Star System]]. Adama is promoted to Commander and given command of ''Pegasus'', with Thrace replacing him as CAG of ''Galactica''. In response to heavy lobbying from Gemenon delegate [[Sarah Porter]] over the Kibby incident, Roslin places a moratorium on abortion. In protest, Vice President Gaius Baltar announces his candidacy for president in the upcoming election.
''Backdated from "Lay Down Your Burdens, Part I".''


===[[Downloaded]]===
=== Season 3 ===
*'''Day 270 (Zero Hour + 9 months)''' - [[Hera]] born. This episode claims that the previous episode "[[Resistance]]" took place "10 weeks before" Day 270. However, 10x7 = 70 and 270 - 70 = 200, this would put Cally's shooting of ''Galactica''-Boomer ''after'' "[[Epiphanies]]" which was stated to take place on Day 189. Even a very liberal estimate could not possibly place "Resistance" more than a week or two after "Kobol's Last Gleaming, Part II", when it was stated on screen that it was Day 51. This reference to "10 weeks" is a mistake, which will be corrected in the DVD and international releases of "Downloaded".
:''See [[Timeline - Season 3 (RDM)]]''


===[[Lay Down Your Burdens, Part I]]===
== 3 ACH to 4 ACH ==
*'''c. Day 256''' - [[Galen Tyrol]] begins a series of recurring suicidal nightmares.
*'''c. Day 269''' - Presidential debates begin. [[Kara Thrace]], [[Felix Gaeta]] and [[Lee Adama]] brief pilots on Caprica SAR mission on ''Pegasus''. Tyrol attacks [[Cally]] after being woken from a nightmare.
*'''c. Day 270''' - Media reports on first debates. SAR team departs; [[Margaret Edmonson|Margaret "Racetrack" Edmonson]] and crew accidentally discover a habitable planet and return to [[the Fleet]]. Tyrol begins counseling with Brother [[Cavil]].
*'''c. Day 280''' - Final presidential debate. SAR team arrives at Caprica and meets with [[Samuel Anders]]'s [[Resistance (movement)|Resistance]].
*'''c. Day 283''' - Polls open (projected).
''Tom Zarek states that the fleet has been "cooped up in metal boxes for nine months" the morning after the debates. This date is roughly taken as Day 270, with an implied give-or-take of a couple weeks. The surrounding events noted above can, however, be placed relative to this point with a good degree of certainty based on episode dialogue.''


===[[Lay Down Your Burdens, Part II]]===
=== Season 4 ===
*'''Day 281''' - Thrace's SAR team and Anders' resistance are pinned down by a Cylon sneak attack.  They are under siege for 18 hours, the next morning they awake to find the Cylons have completely abandoned Caprica.
:''See [[Timeline - Season 4 (RDM)]]''
*'''Day 282''' - The SAR mission returns to Galactica, Cavil is discovered to be a Cylon when a second copy steps off a Raptor.
*'''Day 283''' - The polls open, Baltar wins.  Tory Foster conspires with Col. Tigh and Dualla to rig the vote results to keep Roslin in power.  Their plan is found out by Lt. Gaeta and Admiral Adama convinces Roslin to let the people's will prevail and let Baltar become president.
*'''Day 284''' - Baltar is inaugurated President.  A distraught and emotionally bankrupt [[Gina]] detonates the nuclear warhead given to her by Baltar and destroys ''Cloud 9'' and several other near-by ships.
*'''c. Day 285''' - Adama visits President Baltar aboard ''Colonial One'' and questions him about the ''Cloud 9'' disaster.  A defiant Baltar rebukes all his questions and accusations.
*'''Between c. Day 285 and 660''' - The fleet settles on [[New Caprica]].  Kara Thrace and Samuel Anders marry.  Galen Tyrol and Cally marry, Cally becomes pregnant, Tyrol becomes a union head.  Dualla transfers to ''Pegasus''.  Most of ''Galactica'' and ''Pegasus'' crews retire from active military duty.  Dualla becomes Lee Adama's Tactical Officer on ''Pegasus''.  Felix Gaeta retires from military duty and becomes President Baltar's aide, Karl Agathon replaces him in the CIC.  Former President Laura Roslin becomes a school teacher on New Caprica, Maya, Hera's adoptive mother, is her teacher's assistant. Lee Adama and Kara Thrace have fallen out of favour with one another, while Thrace and Col. Tigh appear to have mended fences.
*'''c. Day 660''' - Admiral Adama discharges Col. Tigh from his duties aboard ''Galactica''.  Tyrol and Cally organize a general labor strike in protest of Baltar's poor leadership as President. Cylon forces occupy New Caprica.


==Future Events==
== References ==
*'''<s>Day 86 + 1 month (c. Day 116):''' Roslin's maximum life expectancy as of Day 86 ([[Flight of the Phoenix]])</s>
{{reflist}}
*'''<s>Day 54 + 3 months (c. Day 144):''' [[Samuel Anders]]'s [[Resistance (movement)|Resistance]]'s anti-radiation med supply projected to run out ("[[Resistance]]").</s>
**Anders' group survives in "[[Downloaded]]", c. Day 270.  They could have simply found more stockpiles of anti-radiation meds in the intervening time period.
***Radation from nukes drop at an exponential rate. It's possible that measured background radiation dropped enough so the anti-radiation meds were no longer needed.
*<s>'''Day 12 + 7 Months (c. Day 222):''' Elections due for President of the [[The Twelve Colonies (RDM)|Twelve Colonies]] ([[Bastille Day]]).</s>
**<s>As of "[[Downloaded]]", c. Day 270, the elections are near but have not yet arrived.</s>
***The elections come and go.  [[Gaius Baltar|Baltar]] is elected President ([[Lay Down Your Burdens, Part I]] and [[Lay Down Your Burdens, Part II|Part II]]).
*'''<s>Day 50 + 6 Months (c. Day 230):''' Roslin's maximum life expectancy as of Day 50 ([[Kobol's Last Gleaming, Part I]]).</s>
**<s>Roslin promised to get the fleet to [[Earth]] before her death '''(c. Day 230)'''</s> ([[Fragged]]).
***As of Day 660 Roslin is still alive and the fleet has not made it to Earth yet ([[Lay Down Your Burdens, Part II]]).
*'''<s>Day 24 + 9 Months (c. Day 294):''' [[Sharon Valerii (Caprica copy)|"Caprica" Sharon Valerii]]'s daughter born. (see [[#Notes|Notes]] below)</s>
**[[Hera]], daughter of [[Helo]] and [[Sharon Valerii (Caprica copy)|"Caprica" Sharon Valerii]] was born premature c. Day 270 ([[Downloaded]]).
*'''Day 36 + 3 years (c. Day 1131):''' Fleet runs out of [[tylium]] fuel that was resupplied from the Cylon asteroid mine; assuming that no other sources have been found before this date. ([[The Hand of God (RDM)|The Hand of God]])
*<s>'''Day 260 (approx) + 18 years (c. Day 6,830)''' Time at which, if the [[Survivor count]] keeps up its current rate of decline and never increases, the human race will simply go extinct, according to Baltar's estimate in "[[The Captain's Hand]]".</s>
** Due to the destruction of ''[[Cloud 9]]'' and surrounding ships in "[[Lay Down Your Burdens, Part II]]", this figure has been drastically altered.


== Notes ==


*The above day listings use a simplistic calendar system with 30 day months and no leap years. The colonial calendar may be more sophisticated.
[[Category:A to Z]]
*<s>The date of Valerii and Agathon's child is speculated, assuming that the [[Cylon agent]]s share the same gestation period that humans do, and that the birth of their hybrid daughter is not [[Wikipedia:premature birth|premature]].</s>
[[Category:Behind the Scenes]]
**Date of Hera's birth is now confirmed at Day 270.
[[Category:Colonial History]]
*Later episodes in "Season 2.5" such as "Resurrection Ship, Part I" and "Epiphanies" state clearly that "Pegasus" and the episodes immediately following it take place six months after the Cylon Attack.  Ron D. Moore did state that it took Tyrol "weeks" to construct the Blackbird and a large amount of time passes in this episode as a result. ''BattlestarWiki'' originally assumed this meant at most 2-4 weeks.  However, the only plausible way that Pegasus and Resurrection Ship, Part I can take place six months after the attack is if "Flight of the Phoenix" actually lasted''' three months '''from beginning to end. Roslin was told in this episode that her cancer had accelerated, and she had only one month to live. As Cally's "welcome back" party happened earlier in the episode, when she was released from the brig around Day 86, a considerable period of time (several weeks at least) pass between these two scenes.
[[Category:RDM]]


[[Category:A to Z]] [[Category:RDM]] [[Category:Colonial History|*]] [[Category:Behind the Scenes]]
[[de:Zeitlinie]]
[[fr:Chronologie (RDM)]]

Latest revision as of 17:39, 24 February 2024

Part of the series on
Timelines of the Battlestar Galactica series


This article plots the events which were shown or mentioned in the history of the Twelve Colonies from the Re-imagined Series and Caprica.

By convention, all dates are relative to the Fall of the Twelve Colonies. Events before the Fall are marked as "BCH," or "Before Cylon holocaust". Given the few and somewhat contradictory dates about the Colonials' ancient history and the exodus from Kobol, that part of the timeline is speculative.

The Cylon holocaust occurs more than 150,000 years ago.

Ancient History

See also: History of the Twelve Colonies, Sacred Scrolls
  • Unspecified time period: Humans on the planet Kobol organize themselves into twelve tribes (TRS: "Miniseries"). According to at least one scripture, they "live in utopia with the gods." The humans become sufficiently advanced to establish viable space travel and artificial, robotic life. Artificial life-forms, machines similar in nature to the later day Cylons, are created by the humans. A war against the machines occurs. At one point the machines evolve and take humanoid form, either before, during or after the war. This group of humanoid Cylons are later referred to in the Sacred Scrolls as the "Thirteenth Tribe," although said text does not specify that they were a tribe of Cylons (TRS: "Sometimes a Great Notion").
  • Over 17,000 years BCH: A supernova creates the Ionian nebula.
  • ca. 4,000 years BCH: The Thirteenth Tribe reportedly leaves Kobol and builds the Temple of Hopes on another planet [1] This contradicts Ellen Tigh's statement that the temple was built 3,000 years ago (TRS: "No Exit"). They pray for guidance and are shown the way to Earth, the planet they colonize.
  • ca. 3,600 years BCH: Pythia records her prophecies. Aside from reports of the landing on Earth and drawings of temples there, this book describes "the exile and rebirth of the human race" and a "dying leader" not making it to a "promised land," though how long before her writings that such events took place is not revealed.
  • ca. 3,000 years BCH: A beacon is left at the Lion's Head Nebula, later marking the way to Earth. At some undated point, someone travels from Earth to Kobol, passing on information about Earth, including a map of its night sky [2]
  • ca. 3,000 years to 2,000 years BCH: The humanoid Cylons of the Thirteenth Tribe prosper and begin to reproduce sexually. The technology of "organic memory transfer," or downloading, is abandoned.
    • The Thirteenth Tribe produce their own mechanical Centurions to act as laborers for their civilization.
  • ca. 2,000 years BCH: (The order of events on Kobol and Earth is uncertain.)
    • Samuel Anders, Tory Foster, Ellen Tigh, Saul Tigh, and Galen Tyrol, later collectively known as the "Final Five," are born on Earth.
    • The Final Five work together in a research lab attempting to re-develop downloading technology. The effort is spearheaded by Galen Tyrol and Ellen Tigh.
    • All five Cylons receive visions of beings nobody else can see warning them of an impending rebellion by Earth's Centurion population. The Final Five prepare a resurrection ship and leave it in orbit.
    • The remaining Twelve Tribes leave Kobol and settle the Twelve Colonies[1].
    • Lord of Kobol "Athena" kills herself in despair over this. A tomb is built for her containing a 3-D projection showing Earth and its Zodiac. The projection is activated by the Arrow of Apollo, which travels with the twelve tribes.
    • The Centurion uprising occurs and the Thirteenth Tribe exterminates itself in a nuclear holocaust. Earth is left a nuclear wasteland. The Final Five die in the attack, and are resurrected on board their orbiting ship.
    • The Final Five begin a journey back to Kobol to find the other twelve tribes and inform them of Earth's fate. They are aware of the cyclical nature of history and believe that the twelve tribes will create Cylons again. They want to warn them to treat them right. However, their ship is not equipped with a conventional FTL drive and journeys at relativistic sublight speeds.
  • 2,000 years to 52 years BCH: The Twelve Colonies grow and prosper. Each colony acts as a sovereign nation, complete with inter-colonial wars.
    • The Final Five stop at the Temple of Hopes as they retrace their tribe's path.
    • The Final Five arrive at Kobol, finding the planet abandoned. They continue on in pursuit of the twelve tribes, heading toward the colonies.

Recent Colonial History

The most recent history could also be dated using the calendar from Caprica, but the method was not used in the re-imagined series and remained in the background even on the new show. Furthermore, it is not known whether the calendar is specific to the planet Caprica or common to the twelve worlds.

First Cylon War

See Timeline - Caprica (RDM)
  • 58—52 years BCH: With the use of a meta-cognitive processor stolen from Tauron rival Tomas Vergis, the Caprican tech CEO Daniel Graystone creates the first Cylons of the Twelve Colonies to aid in hard labor and warfare. A virtual copy of his dead monotheist daughter Zoe Graystone's consciousness is downloaded into one (CAP: "Pilot"). Humanity is unaware that they are repeating the actions of their ancestors on Kobol.
  • ca. 58 BCH:
  • 52 years BCH:
  • 51 years BCH: Colonial ship Brenik is lost after a boarding action by Cylon Centurions (Valley of Darkness, deleted scene).
  • ca. 50 years BCH: Battlestar Galactica enters service.
  • 42 years BCH:
    • William Adama begins his service in the Colonial Fleet as a Raptor pilot aboard Galactica with co-pilot and ECO Coker Fasjovik, 10 years into the Cylon War ("Hero," Blood and Chrome). He is later promoted to Lieutenant and is assigned his first Viper, a Mark III, and a special task force comprised of top pilots for dangerous missions.
    • Battlestar Archeron destroyed by Cylon forces in Sector 12. All hands lost (TRS: "Blood and Chrome").
    • Battlestar Osiris destroyed over Djerba in suicide maneuver against lone Cylon Baseship. All hands lost. Fate of Lt. Jim Kirby (AWOL) unknown.
    • Becca Kelly succeeds in her mission on Djerba, and is later killed by the Cylons. Ghost Fleet Offensive successful, decimating Cylon military holdings in five sectors.
    • Mechanical Cylons begin experiments constructing humanoid forms of Cylon.
  • 42-41 years BCH: Coker Fasjovik presumably musters out of Fleet after termination of second mandatory tour.
  • 40 years BCH:
    • Experiments on "humanoid" Cylons culminate in the creation of the First Hybrid and subsequent Hybrids, but no fully humanoid forms.
    • The Final Five arrive in the Twelve Colonies in the waning days of the war.
    • The Five meet the local Cylons and negotiate an end to the war. They will give the Cylons biological bodies complete with resurrection technology if the Cylons agree to end the war.
    • Operation Raptor Talon conducted by the Colonial Fleet, where William Adama flies his first official Viper mission. Battlestar Columbia destroyed (TRS: "Razor Flashbacks").
    • Armistice ends the Cylon War. Cylons exile themselves from the Twelve Colonies (TRS: "Miniseries"). The First Hybrid and his Guardians part company with the other Cylons.
    • William Adama musters out of the Colonial Fleet ("Scattered," Adama's dossier).

Inter-War Period

  • 37 BCH: William Adama enlists as merchant marine and serves aboard inter-colony freighters ("Scattered," Adama's dossier).
  • 37 to ca. 30 BCH:
    • The Cylons establish a secret base known as The Colony, built around and connected with the original ship of the Final Five. This is the place where research and development equipment belonging to the Final Five is stored.
    • The Final Five create John Cavil, the first of the new humanoid Cylons that are their "children," and designate him model Number One. They raise him for some time.
    • John matures and assists the Final Five in the creation of seven other humanoid Cylon models. A resurrection system is built for the new models based on technology left over from the Thirteenth Tribe.
  • ca. 30 BCH:
    • Cavil murders model Number Seven, Daniel, out of jealousy by poisoning the amniotic fluid in which the Seven copies were maturing.
    • The Final Five are murdered by Cavil and their consciousnesses are boxed.
    • Cavil erases all knowledge of the Final Five and the missing model Number Seven from his fellow humanoid Cylon models and specifically programs them not to think about either.
    • Saul Tigh is resurrected and introduced to the colonies as a military officer with false history of fighting in the war.
    • Ellen Tigh is resurrected and introduced into Colonial society sometime thereafter.
  • ca. 28 BCH:
  • ca. 27 BCH: William and Carolanne Adama meet and marry. [7]
  • ca. 26 BCH: Lee Adama born. [7]
  • ca. 24 BCH: Zak Adama born. [7]
  • 23 years BCH: William Adama reinstated in the Colonial Fleet at the rank of Captain and is assigned to the battlestar Universal [8] ("Scattered" deleted scene, Adama's dossier).
  • 21 years BCH: Saul Tigh reinstated in the Colonial Fleet at the rank of Captain by now-Major Adama (Scattered). [9] [10]
  • 20 years BCH:
  • 17 BCH: William Adama assigned to the battlestar Atlantia, where he makes his 1000th Viper landing (Adama's dossier, "Act of Contrition").
  • 13 years BCH: William Adama assigned as executive officer to the new battlestar Columbia (Adama's dossier).
  • 11 years BCH: Laura Roslin begins her career in politics (TRS: "Litmus").
  • ca. 10 years BCH: Galen Tyrol enlists in the Colonial Fleet as a non-commissioned officer.[11]
  • 9 years BCH: William Adama promoted to commander and assigned as commander of the battlestar Valkyrie (Adama's dossier, "Hero").
  • 7 years BCH: Saul and Ellen Tigh meet and marry again, unaware that it is the second time ("Kobol's Last Gleaming, Part I," deleted scene).
  • 6 years BCH: William Adama leads an aborted covert intelligence mission aboard Valkyrie. Daniel Novacek is shot down and captured by the Cylons. Adama and Tigh are subsequently assigned to Galactica (Adama's dossier, "Hero"). [12]
  • 5 years BCH:
  • 4 years BCH:
  • 3 years BCH: Felix Gaeta assigned to Galactica (Miniseries).
  • 2 years BCH:
  • 1 Year BCH:
    • Last time William and Carolanne Adama speak (Miniseries).
    • Carolanne Adama gets engaged (Miniseries).
    • Anastasia Dualla last visits her home (TRS: "Final Cut").
  • Between 5 and 1 Year BCH:

1 ACH

1 ACH (After Colonial Holocaust) denotes a period of 365 days, the epoch of which is the Fall of the Twelve Colonies. The events of this time period correspond to the majority of Season 1 and Season 2, in addition to:

Return of the Cylons

Season 1

See Timeline - Season 1 (RDM)

Season 2

See Timeline - Season 2 (RDM)

2 ACH to 3 ACH

The "one year time jump" depicted at the end of the Re-imagined Series' "Lay Down Your Burdens, Part II" occurs during 2 ACH, beginning with the Cylon invasion of New Caprica as a result of Gina Inviere's Cloud 9 explosion, forcing the subsequent retreat of the last two battlestars, Galactica and Pegasus.

Season 3

See Timeline - Season 3 (RDM)

3 ACH to 4 ACH

Season 4

See Timeline - Season 4 (RDM)

References

  1. ↑ 1.0 1.1 Tyrol says that "Our initial radiocarbon dating suggests that the temple's at least 4,000 years old, which lines up with the exodus of the Thirteenth Tribe." (TRS: "The Eye of Jupiter"). This is the oldest date noted in the series's timeline, but also conflicts with the prior date of Pythia and her works as described by Elosha in "Kobol's Last Gleaming, Part I," where she states that the exodus of all 13 tribes occurred approximately 2,000 years ago.
  2. ↑ Adama says that "According to Cottle, the virus was an exact match to one reported over 3000 years ago, right around the time that the 13th colony left Kobol" (TRS: "A Measure of Salvation"). This contradicts the two other dates of 2,000 and 4,000 years. While the dating is uncertain, it is the only clue to the beacon's age. That someone traveled back to Kobol is speculation, but an explanation for how Earth's sky could be displayed there. If true, it is still unknown on which of these two voyages the beacon was left behind.
  3. ↑ Doctor Cottle notes the time as "a couple hundred years ago," which is an indeterminate amount of time, but likely less than four or five hundred years.
  4. ↑ From Ronald D. Moore's scifi.com blog post of April 11, 2005: "Colonial Day occurs every year and it is the anniversary of the founding of the "federal" system of government which was a relatively recent event. Before that time, the Colonies functioned more or less on their own, possibly with various attempts at alliances or even complete Colonial government over the centuries since the exodus from Kobol, none of which were successful. When the first Cylons were created, individual Colonies still warred against one another and it wasn't until the Cylon rebellion that the 12 Colonies finally came together in a permanent way. Presumably, the Articles of Colonization were not made up out of whole cloth, however, and there may well be principles and ideas of justice that date back to the original colonists."
  5. ↑ At the time of the Cylon attack, Tyrol has "ten years experience" (TRS: "Miniseries"), and has "served on battlestars since I was 18" (TRS: "Resistance"). This puts his birth in approximately 28 BCH, allowing for a few years leeway with the first comment.
  6. ↑ The podcast for "Scattered" places their meeting "twenty years ago". In "Torn," Adama states that he has known Tigh for 30 years. Furthermore, Adama's dossier places his reinstatement into the Colonial Fleet at 23 BCH. Battlestar Wiki choses to use the more consistent dates.
  7. ↑ 7.0 7.1 7.2 This date is assumed as follows: Zak died 2 BCH. Since he graduated from some kind of military academy, he would be at least 22 years old, following real world models. On a photograph of William Adama with his sons, Lee seems to be about two years older than Zak. Adama and his wife probably met not long before Lee's birth.
  8. ↑ This information comes from a prop used in the episode "Scattered".
  9. ↑ The time between Adama's and Tigh's reinstatement is not specified on screen. The February/March issue of Battlestar Galactica: The Official Magazine gives it as two years: "Adama reenlisted with the service and Tigh spent two years drinking before Adama pulled strings to get him back into service."
  10. ↑ In actually, this is Saul Tigh's entrance into the Colonial Fleet, not his return, as he did not serve in the Cylon War and all documents of his service and retirement were forged by John Cavil.
  11. ↑ At the time of the Cylon attack, Tyrol has "ten years experience" (TRS: "Miniseries"). It is likely that Tyrol (and the two other remaining members of the Final Five, Samuel Anders and Tory Foster), was introduced into Colonial society at or around this point by John Cavil as part of his plan for revenge on his creators, human and Cylon alike (TRS: "No Exit").
  12. ↑ While dialogue from "Hero" places these events at 1 BCH, this contradicts previously established dates about the time Adama and others served on Galactica. See Hero#Analysis for a detailed explanation why Battlestar Wiki chooses to treat this as a continuity error and change the date.
  13. ↑ Since Adama states that Tyrol has been under his commander for "over five years," this might also be one year earlier.
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