He likened the spread of communism in Southeast Asia to a row of dominoes quickly collapsing after the first one falls.

On the 2nd March 1965 the United States military, alongside the Republic of Vietnam Air Force, began Operation Rolling Thunder as part of the Vietnam War.

On the 7th January 1979 Pol Pot, the Cambodian revolutionary and General Secretary of the Central Committee of the Communist Party of Kampuchea, was overthrown when Vietnamese forces captured the capital city Phnom Penh.

Over 500,000 protesters marched on Washington D.C. as part of the national Moratorium to End the War in Vietnam.

Vietnamese Buddhist monk Thích Quảng Đức burned himself to death at a busy crossroads in Saigon.

On the 8th June 1972 one of the most iconic photographs of the Vietnam War was taken of Phan Thị Kim Phúc, a nine-year-old girl from the South Vietnamese village of Trang Bang.