Combat Team Alpha
From Halopedia, the Halo wiki
The Combat Team Alpha was a United Nations Space Command Marine unit stationed aboard the UNSC Pillar of Autumn. In the abandonment of the warship, it was to hold off the invaders until all non-bridge operations personnel escaped in lifepods, and then retreat to an evacuation station aboard the Pillar of Autumn during the Covenant boarding action. Combat Team Sierra through Combat Team November evacuated after them.
