Respuesta :
The Vietnam War was known in Vietnam as "The Resistance War Against America" from around 1955 and 1975; it was initially (the 2nd Indochina War) between North Vietnam and South Vietnam; North Vietnam supported by U.R.S.S. and South Vietnam supported by U.S.A. which got involved around 1960, the conflict was intensified by the "Cold War" at that time.
The "Viet Cong" used guerrilla warfare and American soldiers had trouble finding attackers in the dense jungles; around 58,000 Americans were killed in that war; U.S.A. took away forces in 1973 and North Vietnam took control of South Vietnam.
Answer: had trouble finding attackers in the dense jungles.