Odyssey
From Halopedia, the Halo wiki
The Odyssey was the first Human colony ship. It colonized the worlds of the inner colonies. It was laden with troops and terra forming gear—spearheads the colonization of a new world. This sparked the first wave of human expansion beyond the confines of the Solar System. It was launched on January 1, 2362.
Sources
- http://www.xbox.com/en-US/games/h/halo/storyline.htm - Xbox.com Backstory