The 81st Division was a military formation of the People's Volunteer Army (Chinese People's Volunteers (CPV) or Chinese Communist Forces (CCF)) during the Korean War. They were a component of the 27th Army.
On November 28, 1950, the 80th Division hit the dispersed U.S. units of Task Force Faith with waves of infantry. Despite the presence of tracked antiaircraft weapons, the sub-zero cold and the constant Chinese attacks began to take their toll. The fighting was often hand to hand and convinced the (initial) U.S. Task Force commander, Colonel MacLean, to order a pullback to form a more consolidated defense. However, during the withdrawal operations his troops came under renewed enemy attack, and in the confusion MacLean was captured by the Chinese.
The Task Force Faith page also states that the 81st Division participated in the attack, and that though they were possibly reinforced, comprised 15,000+ troops.