Now how long did it take for the Alliance sleeperships to get to Sirius?
BS16/2164A.D. - The Alliance's top-secret operation, "SIRIUS EXODUS" is set for launch from a remote and well defended Alliance outpost on Jupiter's moon, Europa. Unfortunately, somehow the Coalition forces discovered the information in time and sent a destroyer fleet to stop the ships from launching... Thanks to the valiant efforts of the defending Alliance fleet, all 5 ships, The "LIBERTY", the "BRETONIA", the "RHIENLAND", the "KUSARI" and the "HISPANIA" all break through the Coalition blockade and successfully engage their light-speed engines towards the Sirius sector in hope of finding a new home(s) for the Alliance peoples.
0AS/2180A.D. - The "HISPANIA" sleeper ship arrives in Omicron Alpha; although not formally recognized in Sirius history or folklore, this could suggest that the "Outcast" colony is older than any of the "lawful" colonies and that the "Corsair" colony is even older. The history of the "HISPANIA" before it reached the Sirius sector is said that the vessel was possibly sabotaged by either the Coalition spies or by perhaps even by spies of one of the fellow allies of the Alliance! Due to this, the "HISPANIA" limps into Sirius at sub-light speed; at the first solar system with a habitable planet, the passengers of the HISPANIA take a vote. All people of the future "Corsairs" took to the escape pods of the "HISPANIA" and landed to the surface of the first somewhat habitable planet found in the solar system in what would be known as Omicron Gamma. The remaining passengers of the "HISPANIA", later to be known as "Outcasts", limped along in the sleeper ship until they came into the system with a planet of a barely habitable ecosystem, of what would be eventually known as Omicron Alpha.
1AS/2181A.D. - The Manhattan colony, interstellar passengers of the "LIBERTY" sleepership, is established on what will be known as planet Manhattan, in a system that will also be eventually known as the New York system, in the Sirius sector.
2AS/2182A.D. - Within this following year, the remaining Alliance sleeper ships make land-fall at their respective, future capital planets in each future capital system. The "BRETONIA" lands on it's future rainy, temperate capital planet, New London; the "KUSARI" lands on the future water/island world of New Tokyo; the "RHEINLAND" lands on it's cold, frigid world of New Berlin.