Vietnam War

A tank offers support to a group of U.S. Marines awaiting signal to advance on trapped North Vietnamese unit near Da Ha near the DMZ, June 24, 1968. (AP Photo/Dana Stone)

An M48A3 tank supports Marines ready to attack North Vietnamese soldiers near the Demilitarized Zone separating North and South Vietnam in June 1968. The previous year, a unit of the Marines’ 1st Tank Battalion, which escorted infantrymen on patrol in the 1st Marine Division, rushed into the dark night to battle enemy forces about to overrun a platoon base. (AP Photo/Dana Stone)

AP Photo/Dana Stone