Gettysburg
From Halopedia, the Halo wiki
UNSC Frigate. On July 17, 2552, The Gettysburg, along with the UNSC Alliance, responded to a distress signal sent by Captain Keyes from the Sigma Octanus system. The vessel later fought in the battle of Sigma Octanus IV.
The Vessel later retured to the orbital space dock of Reach, where it was heavily damaged in the battle of Reach.
Eventually, The Master Chief, along with several survivors of Reach, used the Gettysburg, fusing it with the Covenant ship Ascendant Justice, thus becoming the first hybrid vessel with a human and a covenant ship in history
