Births on December 20

Karl Wendlinger, Austrian race car driver

Karl Wendlinger (born 20 December 1968) is an Austrian professional racing and former Formula One driver.

30 Jan

Tet Offensive
Vietnam War: Tet Offensive launch by forces of the Viet Cong and North Vietnamese Army against South Vietnam, the United States, and their allies.
31 Jan

Tet Offensive
Vietnam War: Viet Cong guerrillas attack the United States embassy in Saigon, and other attacks, in the early morning hours, later grouped together as the Tet Offensive.
29 Apr

Counterculture of the 1960s
The controversial musical Hair, a product of the hippie counter-culture and sexual revolution of the 1960s, opens at the Biltmore Theatre on Broadway, with some of its songs becoming anthems of the anti-Vietnam War movement.
14 Oct

U.S. Marine Corps
Vietnam War: The United States Department of Defense announces that the U.S. Army and U.S. Marine Corps will send about 24,000 soldiers and Marines back to Vietnam for involuntary second tours of duty in the combat zone there.
20 Oct

Jacqueline Kennedy
Former First Lady Jacqueline Kennedy marries Greek shipping tycoon Aristotle Onassis.