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.

hello your answer is

china and usa

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july 1861 here you go hope it