Richard Nixon becomes the first US president to resign, facing likely impeachment over the Watergate scandal.
The United States, North and South Vietnam and the Provisional Revolutionary Government sign an agreement ending direct US involvement in the war.
The last US combat units leave South Vietnam under the terms of the Paris Peace Accords.
Arab oil producers impose an embargo on countries supporting Israel, causing world oil prices to soar.
Hundreds of thousands of people flee Vietnam by sea after 1975; many die at sea and others are resettled, mostly in Western countries.
North Vietnamese forces enter the Independence Palace; the Republic of Vietnam surrenders, ending the Vietnam War.
U.S. President Richard Nixon's visit opens the way to normalised relations between the United States and China.