WHAT ALL HAPPENED MARCH TO APRIL 1973
Find out what all happened March to April 1973

The Liberal Movement breaks away from the Liberal and Country League in South Australia. (2. April 1973)

Watergate scandal: U.S. President Richard Nixon announces that top White House aides H. R. Haldeman, John Ehrlichman and others have resigned. (30. April 1973)

Black September storms the Saudi embassy in Khartoum, Sudan, resulting in the assassination of three Western hostages. (1. March 1973)

Project Tiger, a tiger conservation project, is launched in the Corbett National Park, India. (1. April 1973)

Launch of the LexisNexis computerized legal research service. (2. April 1973)

Martin Cooper of Motorola makes the first handheld mobile phone call to Joel S. Engel of Bell Labs, though it took ten years for the DynaTAC 8000X to become the first such phone to be commercially released. (3. April 1973)

A British Vickers Vanguard turboprop aircraft crashed in a snowstorm at Basel, Switzerland killing 104 people. (10. April 1973)

The Portuguese Socialist Party is founded in the German town of Bad Münstereifel. (19. April 1973)

Kenyan athlete Kip Keino defeats Jim Ryun at the first-ever professional track meet in Los Angeles. (24. March 1973)

Operation Barrel Roll, a covert US bombing campaign in Laos to stop communist infiltration of South Vietnam, ends. (29. March 1973)

A Lockheed C-141 Starlifter, dubbed the Hanoi Taxi, makes the last flight of Operation Homecoming. (4. April 1973)

George Lucas begins writing the treatment for The Star Wars. (17. April 1973)

The Pulitzer Prize-winning photograph Burst of Joy is taken, depicting a former prisoner of war being reunited with his family. (17. March 1973)

Launch of Pioneer 11 spacecraft. (6. April 1973)

The American League of Major League Baseball begins using the designated hitter. (6. April 1973)

The World Trade Center in New York is officially dedicated. (4. April 1973)

Vietnam War: The last United States combat soldiers leave South Vietnam. (29. March 1973)