UNSC Lancelot
From Halopedia, the Halo wiki
The UNSC Lancelot was a Destroyer in the UNSC Navy. The Lancelot was one of the four dozen vessels present during the second battle of Sigma Octanus IV. It was seen by then-Commander Keyes charging straight into the Covenant fleet. Its fate is unknown but if it survived the battle it is highly likely that the vessel was destroyed at the battle of Reach.
