| 452 | | Attila the Hun invades Italy. |
| 632 | | Mohammed, the founder of Islam and unifier of Arabia, dies. |
| 793 | | The Vikings raid the Northumbrian coast of England. |
| 1861 | | Tennessee votes to secede from the Union and join the Confederacy. |
| 1862 | | The Army of the Potomac defeats Confederate forces at Battle of Cross Keys, Virginia. |
| 1863 | | Residents of Vicksburg flee into caves as General Ulysses S. Grant's army begins shelling the town. |
| 1866 | | Prussia annexes the region of Holstein. |
| 1904 | | U.S. Marines land in Tangiers, Morocco, to protect U.S. citizen. |
| 1908 | | King Edward VII of England visits Czar Nicholas II of Russia in an effort to improve relations between the two countries. |
| 1915 | | William Jennings Bryan quits as Secretary of State under President Wilson. |
| 1953 | | The Supreme Court forbids segregated lunch counters in Washington, D.C. |
| 1965 | | President Johnson authorizes commanders in Vietnam to commit U.S. ground forces to combat. |
| 1966 | | Gemini astronaut Gene Cernan attempts to become the first man to orbit the Earth untethered to a space capsule, but is unable to when he exhausts himself fitting into his rocket pack. |
| 1967 | | Israel airplanes attack the USS Liberty, a surveillance ship, in the Mediterranean, killing 34 Navy crewmen. |
| 1968 | | James Earl Ray, the alleged assassin of Martin Luther King, Jr., is captured at the London Airport. |
| 1969 | | President Richard Nixon meets with President Thieu of South Vietnam to tell him 25,000 U.S. troops will pull out by August. |
| 1995 | | U.S. Air Force pilot Captain Scott O'Grady is rescued by U.S. Marines in Bosnia. |
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