In 1965, as the conflict in Vietnam intensified, the United States declared war against North Vietnam. decreased the number of US troops in Vietnam. escalated its troop commitment to the conflict. began defending North Vietnam against the Viet Cong

In 1965, as the conflict in Vietnam intensified, the United States escalated its troop commitment to the conflict. This decision came after the U. S. recognized the South Vietnamese forces were losing the war against the Northern Vietnamese Viet Cong.