The 2nd Battalion disengaged from the North Korean and began its withdrawal at 03:00, September 6. The battalion abandoned two of its own tanks, one because of mechanical failure and the other because it was stuck in the mud. The battalion moved to the rear in two main groups: G Company to attack Hill 464 and the rest of the battalion to seize Hill 380, farther south. The North Koreans quickly discovered that the 2nd Battalion was withdrawing and attacked it. The battalion commander, Major Omar T. Hitchner, and his operations officer, Captain James T. Milam, were killed. In the vicinity of Hills 464 and 380 the battalion discovered at daybreak that it was virtually surrounded by North Koreans. Nist thought that the entire battalion was lost.