A dead Viet Cong lies in a pit as U.S. Marines fire on Communist positions here December 10th, 1965. The Marines entered the battle to rescue a battalion of government troops almost wiped out by the Viet Cong. Thousands of U.S. Marines from the 7th fleet poured ashore and trapped a Viet Cong out of 1,500 men in the largest operation for the Marines in the conflict, Hoi An, South Vietnam