Members of the 9th U.S. Marine Expeditionary Force go ashore at Danang, South Vietnam, on March 8, 1965. Assigned to beef up defense of an air base, they were the first U.S. combat troops deployed in the Vietnam War.
Brig. Gen. Viet Luong of the 1st Cavalry Division came to the United States in the 1970s after his family fled Vietnam in the waning days of the war there. He's now leading the effort to train Afghan soldiers to fight the Taliban.
A U.S. Air Force C-123 sprays herbicides on dense jungle beside a South Vietnamese highway on May 18, 1966. This aircraft is the last in a formation of three. Spray from the other two planes can be seen ahead.
U.S. Air Force via AP