1792 – King Gustav III of Sweden dies after being shot in the back at a midnight masquerade ball at Stockholm's Royal Opera 13 days earlier. He is succeeded by Gustav IV Adolf.
1847 – Mexican-American War: United States forces led by General Winfield Scott take Veracruz after a siege.
1865 – American Civil War: Federal forces under Major General Philip Sheridan move to flank Confederate forces under Robert E. Lee as the Appomattox Campaign begins.
1867 – Queen Victoria gives Royal Assent to the British North America Act which establishes the Dominion of Canada on July 1.
1882 – The Knights of Columbus are established.
1911 – The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
1936 – In Germany, Adolf Hitler receives 99% of the votes in a referendum to ratify Germany's illegal reoccupation of the Rhineland, receiving 44.5 million votes out of 45.5 million registered voters.
1951 – Ethel and Julius Rosenberg are convicted of conspiracy to commit espionage.
1957 – The New York, Ontario and Western Railway makes its final run, the first major U.S. railroad to be abandoned in its entirety.
1961 – The Twenty-third Amendment to the United States Constitution is ratified, allowing residents of Washington, D.C., to vote in presidential elections.
1971 – My Lai massacre: Lieutenant William Calley is convicted of premeditated murder and sentenced to life in prison.
1971 – A Los Angeles, California jury recommends the death penalty for Charles Manson and three female followers.
1973 – Vietnam War: The last United States combat soldiers leave South Vietnam.
1974 – NASA's Mariner 10 becomes the first spaceprobe to fly by Mercury. It was launched on November 3, 1973.
1999 – The Dow Jones Industrial Average closes above the 10,000 mark (10,006.78) for the first time, during the height of the internet boom.
2004 – The Republic of Ireland becomes the first country in the world to ban smoking in all work places, including bars and restaurants.
2010 – Two female suicide bombers hit the Moscow Metro system at the peak of the morning rush hour, killing 40.