The 1st Air Cavalry Division (First Team) is a well decorated and highly skilled air assault infantry formation of the UNSC Army, assigned to the UNSC Army Airborne Corps. First established in 2494, the organization can link their lineage back to the 1st Cavalry Division of the US Army. The division served as a rapid response formation of the UNSC Army during the Human-Covenant War, serving as one of the most elite units of the UNSC Defense Force at the time. It gained notoriety for it's actions during the Sahamandrevo II Campaign, Fall of Reach, and Battle of Earth.