Marines arrive by landing craft at Da Nang, where U.S. forces were stationed to mobilize against Viet Cong guerrillas.
U.S. Navy rockets flash from beneath the wings of a Phantom F4B during an attack on a Viet Cong position.
In this April 30, 1975 file photo, a North Vietnamese tank rolls through the gate of the Presidentialalace in Saigon, signifying the fall of South Vietnam.
In this April 1969 file photo, a South Vietnamese woman mourns over the body of her husband, found with 47 others in a mass grave near Hue, Vietnam
In this Jan. 1, 1966 file photo, women and children crouch in a muddy canal as they take cover from intense Viet Cong fire at Bao Trai, about 20 miles west of Saigon, Vietnam.
Left - In this June 17, 1967 file photo, medic James E. Callahan of Pittsfield, Mass., treats a U.S. infantryman who suffered a head wound when a Viet Cong bullet pierced his helmet during a three-hour battle in war zone D, about 50 miles northeast of Saigon.
Right - In this January 1966 file photo, First Cavalry Division medic Thomas Cole, from Richmond, Va., looks up with one uncovered eye as he treats a wounded Staff Sgt. Harrison Pell during a firefight in the Central Highlands in Vietnam, between U.S. troops and a combined North Vietnamese and Vietcong forcey