Gettysburg

Summary
UNSC Frigate. On July 17, 2552, The Gettysburg, along with the UNSC Alliance, responded to a distress signal sent by Captain Jacob Keyes, who was a comander at the time, from the Sigma Octanus system. The vessel later fought in the battle of Sigma Octanus IV.

The Vessel then 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. It was used because the Ascendat Justice had a severely damaged reactor and was incapable of Slipspace travel on its own.

Eventually, the Vessel was unlinked from the Justice so that Admiral Whitcomb and Lieutenant Haverson could use the Justice to destroy the covenant battle station Unyielding Hierophant. The Gettysburg made it back to earth with four survivng Spartans aboard. It is assumed that it has either been repaired or scrapped since then.