The strain of battle for Dong Xoai is shown on the face of U.S. Army Sgt. Philip Fink, an advisor to the 52nd Vietnamese Ranger battalion, shown June 12, 1965.

March for Peace (Washington, D.C.): I won't fight in Vietnam (1965)

Vietnam War protesters in 1965.

USA. Vietnam War, 1965

Vietnam 1965 Red Beach

Saigon. 1965

The New War: General Westmoreland / Vietnam War | Newsweek 1965 July 5 -

Feb 9, 1968, Hue, South Vietnam - With ammunition slung over his shoulder and a rifle in his hand, this American GI has a quiet moment for thought during a pause in the fighting at Hue. A week after the first enemy assault in this area, allied forces were making slow progress in clearing Hue of Viet Cong and North Vietnamese troops. © Bettmann/CORBIS ~ Vietnam War

Soldier of the Vietnam War.

US Soldiers and medics helping Vietnamese civilians.

12 Apr 1968, Saigon, Vietnam --- 4/12/1968-Saigon, Vietnam- Soldiers of the 25th Infantry Division look at the bodies of more than 50 Viet Cong killed in the Battle of Good Friday 80 miles NW of Saigon 4/12. The Infantry Division was participating in Operation Complete Victory when their campsite was attacked. --- Image by © Bettmann/CORBIS

Viet Cong Girl

A Vietnamese woman carries her children and possessions on bamboo pole as she tries to escape fierce fighting in the Cholon suburb of Saigon during the Viet Cong Mini Tet offensive of the Vietnam War in May 1968 --- Image by © Nik Wheeler/Corbis

Vietnam War A South Vietnamese refugee arrives in the US. 1975.

1966 South Vietnamese boy soldier with rifle strapped across his back.

Vietnam War South Vietnamese soldiers show off a Viet Cong prisoner captured near Tan Son Nhut Airbase. May 6, 1968

March 1968, Khe Sanh, Vietnam March 1968, Khe Sanh, Vietnam --- Khe Sanh, a remote outpost in Vietnam, faced full-scale siege from the North Vietnamese forces during the Vietnam War until it was finally abandoned to the North Vietnamese, two months after the siege began

February 17, 1968, Hue, South Vietnam - U.S. Marines guarding Viet Cong prisoners captured during battle for Hue.

1965 Green Berets in Dak To

22 Feb 1965, Saigon, South Vietnam --- General Tran Van Minh (known as Little Minh), was named Commander-in-Chief of Vietnam's armed forces by Chief of State Phan Khac Suu. Minh replaced General Nguyen Khanh, who resigned after two days of pressure by other generals calling for his ouster. --- Image by © Bettmann/CORBIS

July 1969 --- Nixon Visits US Troops in South Vietnam.