Thirty CH-21 Shawnee helicopters were needed to airlift the entire ARVN 1st Battalion, 11th Infantry Regiment, but only ten were available. As a result, Dam could only send one company at a time onto the battlefield. At around 07:00, the first wave of CH-21 helicopters offloaded the first group of South Vietnamese soldiers. These troops had to hold their positions until the rest of the battalions had arrived. Because of the delay in the arrival of the regular South Vietnamese army units, two Civil Guard battalions of Task Forces A and B—under the command of Dinh Tuong provincial chief Major Lam Quang Tho—were left to march against enemy positions by themselves.