Answer:
Disguising troops as civilians.
Explanation:
Viet Cong troops disguise themselves as a civilian during the Vietnam war in Vietnam to fight with South Vietnamese and American soldiers. The Viet Cong troops in the South were known as the Ghost Army. In most parts of South Vietnam, the National Liberation Front remained an underground organisation with its movements and activities hidden. There was no uniform for the Viet Cong troops, so they remain identical as the South Vietnamese.
