Combat Team Sierra
From Halopedia, the Halo wiki
Combat Team Sierra was a UNSC Marine Corps unit. [1]
Background
Combat Team Sierra was stationed aboard the UNSC Pillar of Autumn in 2552. During the abandonment of the warship to the Covenant bombardment and boarding, the team's objective was to hold off the invaders until all non-bridge operations personnel and Combat Teams Alpha through November escaped in the lifeboats, and subsequently, fall back to an evacuation station aboard the Pillar of Autumn.
