This major 1967 operation attempted to clear out nlf strongholds around saigon.

The answer is Operation Cedar Falls

Operation Cedar Falls was the largest American ground military operation of the Vietnam war, lasting for 18 days, from 8 to 26 January 1967. This offensive aimed to clear out strongholds of the National Liberation Front (also called Viet Cong) around Saigon. Its main targets were the Thanh Dien Forest Preserve and the "Iron Triangle", which was a 60-square-mile jungle located northwest Saigon that American forces believed that contained communist base camps and supply dumps.

definitely a for sure. ill see and update if i get the answer

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.