A．Vietnam War is the military struggle fought in Vietnam from 1959 to 1975, involving the North Vietnamese in conflict with the United States forces and the South Vietnamese army.
B．In 1965 the United States got involved in the war in order to prevent the South Vietnamese government from collapsing.
C．During the conflict, approximately 1.5 to 2 million Vietnamese on each side were killed and more than 58,000 Americans lost their lives.
D．The U.S. government supported the South Vietnamese government and its policies led to rebellion in the North.