History and specifications
When the Cylons attacked the twelve homeworlds of the Cyrannus system, its Human leadership decided to unite against the common threat. The Articles of Colonization established the Twelve Colonies of Kobol. Part of the incentive to join was that each of the Colonies would receive a Jupiter-class battlestar (RDM video game: Battlestar Galactica Deadlock game intro).
These ships were produced one by one by Daidalos, a major space station and shipyard. Galactica was the first ship of the class, and delivered to Caprica. Unfortunately, the vessel went missing two weeks into deployment.
Following the loss of Colonial Fleet HQ at Picon, Rear Admiral Lucinda Cain of Daidalos inherited command of the remaining fleet. Her first order was to complete Athena, fifth ship of the class, and deliver it to Picon. While at Scorpia, Daidalos came under attack from the Cylons. The station's defended repelled the attackers, protecting Daidalos and the moored Athena (RDM video game: Battlestar Galactica Deadlock: Season 1 mission: "Mission 1: Scorpia").
After jumping to Picon, Athena was launched and initially placed under the command of Daidalos. Together, the flotilla repelled more Cylons, including a pair of Nemesis-class, Talon-class and war drive raiders (RDM video game: Battlestar Galactica Deadlock: Season 1 mission: "Mission 2: Athena").
During Operation Anabasis, Lieutenant Samantha Agathon led a fleet of 10,000 people from distant colonies back to Caprica. Her fleet included a Jupiter-class battlestar. Though heavily damaged, the vessel reached Caprica (RDM video game: Battlestar Galactica Deadlock: Operation Anabasis intro).
Around the 5th to 7th year of the conflict, Daidalos jumped to Aerilon to deliver Demeter, the eighth Jupiter battlestar. It was the first Jupiter named after its colony's patron Lord of Kobol, Demeter. Demeter was successfully delivered, amidst an attack of Cylons. Due to internecine conflict among the Colonials, Cain and Agathon expected that the 9th Jupiter would still be completed and delivered to Canceron, but that Sagittaron and Gemenon would be exempt due to sanctions placed on them. On top of that, Aquaria had pulled out of the project (RDM video game: Battlestar Galactica Deadlock: Sin and Sacrifice mission: "Mission 1: Demeter").
Galactica was crippled by Cylon forces and crash-landed in an Caprican ocean. Cain dissolved the Colonial fleet.
One year later, Silas Nash organized the recovery of Galactica from the Phoebian Ocean. He forced the class's designer to upgrade the ship. As a result, Galactica became the first Jupiter Mk. II battlestar. With Colonial Fleet reformed and re-organized, Galactica became the flagship of Battlestar Group 75 (RDM video game: Battlestar Galactica Deadlock: Resurrection).
As a result of the success of Galactica as a Jupiter Mark II battlestar, all of the other Jupiter class battlestars were upgraded to the Mark II configuration with the original Jupiter design being almost phased out within a few years.
In the war's 12th and final year, three Jupiters were involved in a battle with Cylons. While Galactica survived, Columbia , flagship of BSG-83 was destroyed by Cylon basestars that outflanked her and destroyed her with a barrage of missiles, torpedoes and their Raiders (TRS: "Razor Flashbacks").
- Columbia may be the ninth Jupiter, meant for Canceron.
- Athena (5th delivered, for Picon)
- Demeter (8th delivered, for Aerilon)
- Galactica (2nd delivered, for Caprica)
- Archeron (for Scorpia)