Editing Timeline (RDM)

{{timeline series}}

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]].

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#Analysis|Sacred Scrolls]]''
*'''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}}. 
*'''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 [[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.
*'''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.
*'''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>
*'''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.
**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 of Kobol|Twelve Colonies]]<ref name="kobol"/>.
**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.
**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 [[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.

*'''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]]. 

===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 (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.
*'''ca. 58 BCH:'''
**[[William Adama]] born in [[Qualai]], {{RDM|Caprica}}. He is named for his deceased older brother. ([[Hero]], [[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]]).

===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 [[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]].

== 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 [[Miniseries|Cylons]] ===
*{{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}}.

=== 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 {{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'']].

=== Season 3 ===
:''See [[Timeline - Season 3 (RDM)]]''

== 3 ACH to 4 ACH ==

=== Season 4 ===
:''See [[Timeline - Season 4 (RDM)]]''

== References ==
{{reflist}}


[[Category:A to Z]]
[[Category:Behind the Scenes]]
[[Category:Colonial History]]
[[Category:RDM]]

[[de:Zeitlinie]]
[[fr:Chronologie (RDM)]]