The Brazilia was a modified freighter launched in 2083 as a part of the Flotilla, humanity's first manned interstellar colonization effort.
Sometime after the destruction of the Palestine, two members of the crew discovered an alien starship following the fleet, and made first contact. Unfortunately, both died before reporting their discoveries back to their vessel.
After Sky Haussmann's treachery and the accidental destruction of the Palestine, the Brazilia allied itself with the Baghdadagainst the Santiago. One reaching the 61 Cygni-A system, the two ships coordinated their colonization of Journey's End; the descendants of the two crews and their passengers were eventually considered a single nation, apart from the descendants of the Santiago.