| 0 | | World Intellectual Property Day |
| 0 | | Feast of Sts Anacletus and Marcellinus, Popes and Martyrs, and that of St Rafael Arnáiz Barón, Patron of World Youth Day |
| 757 | | Acession of Pope Paul I (757-767), later canonized; the brother of Stephen II (752) |
| 1478 | | The Pazzi attempt to assassinate the Medici at mass |
| 1501 | | Cesare Borgia captures Faenza, besieged since Nov 7, 1500 |
| 1604 | | Battle of Blankenbergh: Spanish defeat the Dutch |
| 1607 | | English colonists land at Cape Henry, Va |
| 1654 | | The Spanish expell Jews from Brazil |
| 1655 | | The Dutch permit Jews to settle in Nieuw Amsterdam |
| 1777 | | Sybil Ludington, 16, makes a daring ride to alert Connecticut militiamen of a British raid |
| 1805 | | Cyrus Eaton, the proverbial "few Marines", one USN medic, and some mercs storm Derna, Libya |
| 1814 | | King Louis XVIII lands at Calais, from exile in England |
| 1828 | | the Tenth Russo-Turkish War began -- Learn More |
| 1846 | | Mexican War: Mexicans beat U.S. Dragoons at Rancho Carricitos, Tx |
| 1859 | | Lombardy-Venetia War: Piedmont rejects Austria's ultimatum to disarm and declares war; France mobilizes in support |
| 1861 | | Brig. Gen. Joseph E. Johnston resigned from the commission in the U.S. Army to join the Confederacy |
| 1865 | | Battle of Durham Station/Greensboro, NC |
| 1865 | | Battle of Ft Tobacco, VA |
| 1865 | | Gen. Joseph E Johnston surrendered the Confederate Army of Tennessee to the Union |
| 1913 | | China: Sun Yat San revolts against Pres Yuan Shikai |
| 1926 | | Germany & Russia sign neutrality & friendship treaty |
| 1933 | | Jewish students are barred from school in Germany |
| 1937 | | Luftwaffe bombs Guernica, Spain, 200-400 die |
| 1938 | | Austrian Jews required to register property above 5,000 Reichsmarks |
| 1941 | | Nazis ration potatoes in Holland |
| 1943 | | Attu: U.S. ships shell Japanese positions. |
| 1943 | | German sub 'U-180' transfers Indian radical Subhas Chandra Bose to Japanese sub 'I-29' in the Indian Ocean. |
| 1944 | | First attack by Japanese fighters on B-29s, one fighter shot down |
| 1944 | | New Guinea: Australians take Alexishafen as Americans take the airfield at Hollandia |
| 1944 | | Allied troops begin concentrating at assembly areas in Britain for D-Day |
| 1945 | | Okinawa: Japanese resistance intensifies, halting U.S. offensive |
| 1952 | | USS 'Hobson' (DD-464) accidentally rams carrier 'Wasp' (CV-18), 176 die |
| 1959 | | Cuban-sponsored guerrillas invade Panama |
| 1961 | | Collapse of Raoul Salan's coup against the French Fifth Republic under Pres. De Gaulle |
| 1962 | | Lockheed A-12 flies for first time |
| 1968 | | US underground nuclear test, "Boxcar", one megaton device |
| 1982 | | The Falklands War: Argentine forces on South Georgia I. surrender to the British |
| 1986 | | A fire devastates the nuclear power plant at Chernobyl, Ukraine |
| 121 | | Marcus Aurelius, soldier-philosopher, Roman Emperor (161-180) -- Learn More |
| 570 | | Mohammed, by the Shi'a chronology |
| 1228 | | Conrad von Honenstaufen, d. 1254, King Conrad II of Jerusalem,(1228-1254), IV of Germany (1237-1254), & I of Sicily (1250-1254). |
| 1319 | | King Jean II "the Good" of France (1350-64), royal chucklehead and prisoner-of-war -- Learn More |
| 1573 | | Marie de'Medici, Mrs. Henri IV of France, who taught the French to cook, d. 1642 |
| 1648 | | Dom Peter II "the Peaceful", Regent (1668–83), then King of Portugal and the Algarves (1683–1706) |
| 1718 | | Esek Hopkins, Commodore, Continental Navy (1775-1783), d. 1802 -- Learn More |
| 1774 | | Anne Jean Marie René Savary, French soldier, diplomat, and police official -- Learn More |
| 1798 | | Ferdinand Victor Eugène Delacroix, French Romantic artist ("The Massacre of Chios", etc), d. 1862 |
| 1812 | | Alfried Felix Alwyn Krupp, German arms merchant, d. 1887 |
| 1827 | | Charles Edward Hovey, Brig Gen, U.S., d. 1897 |
| 1893 | | Dragoljub "Draža" Mihailovic, Serbian soldier, leader of the Yugoslav Chetniks in WW II, executed 1946 |
| 1894 | | Rudolph Hess, Nazi, suicide in prison, 1987 |
| 757 | | Pope Stephen II (752-757) |
| 1196 | | King Alfonso II of Aragon (1162-96), c. 39 |
| 1478 | | Giuliano de' Medici, c. 28, assassinated by the Pazzi while at mass, and Francesco Pazzi, Jacopo de' Pazzi, & Cardinal Francesco Salviati lynched by the Florentines for murdering him |
| 1489 | | Ashikaga Yoshihisa, 24, Ashikaga Shogun of Japan (1473-1489), while on campaign |
| 1538 | | Diego de Almagro (c. 63), Conquistador, executed by Pizzarro |
| 1865 | | John Wilkes Booth, 27, hearth trhob, assassin, shot trying to avoid arrest |
| 1881 | | Ludwig Samson Arthur Freiherr von und zu der Tann-Rathsamhausen, 65, Bavarian soldier, German Field Marshal |
| 1998 | | Monsignor Juan José Gerardi Conedera, 75, Auxiliary Bishop of Guatemala, Roman Catholic human rights advocate, murdered by right wing radicals |
| 2004 | | Gunther Rothenberg, military historian, b. 1923 |