| 0 | | Navy Day in Argentina |
| 0 | | Feast of St. Paschal Baylón, Patron of Cooks, Shepherds, Male Children, and much else |
| 352 | | Accession of Pope Liberius (352-366) |
| 884 | | Election of Pope Adrian III (884-885), later canonized |
| 1102 | | Second Battle of Ramalah: Crusaders defeat the Fatimids |
| 1198 | | Frederick II von Hohenstaufen, age 4, crowned King of Sicily (1198-1150) |
| 1540 | | Battle of Kanauj: The Afghans defeat the Moghuls |
| 1648 | | Battle of Zusmarshausen: Swedes defeat the Imperialists |
| 1742 | | Battle of Chotusitz: Prussians defeat the Austrians |
| 1756 | | Britain declared war on France, initiating the Seven Years' War -- Learn More |
| 1790 | | Royal Navy Lt. John Poo Beresford helped capture the French ship 'Prevoyante' -- Learn More |
| 1794 | | Battle of Tourcoing, Day 1: French v. Austro-English (ends 18th) |
| 1797 | | Royal Navy's Sptihead "Mutiny" ends peacefully (from April 16) |
| 1809 | | Napoleon annexes the Papal States to his Empire |
| 1814 | | Denmark cedes Norway to Sweden |
| 1849 | | Great Fire of St. Louis |
| 1863 | | Battle of Big Black River Bridge: Grant begins sealing off Vicksburg |
| 1864 | | Battle of Adairsville, Ga: Union forces Confederate retreat |
| 1876 | | Rosebud Campaign: Custer & the 7th Cavalry leave Fort Lincoln |
| 1890 | | Havana: Magazine explosion, 34 die, c. 100 injured |
| 1900 | | The Boers besiege Mafeking |
| 1905 | | Norway declares independence from Sweden |
| 1938 | | Bound for California, Douglas "Wrong Way" Corrigan lands in Dublin |
| 1940 | | Germans capture Brussels |
| 1942 | | Japanese sub 'I-28' sunk by 'Tautog' (USS-198). 'I-164' by 'Triton' (SS-201) |
| 1943 | | RAF 617 Squadron carried out “Operation Chastise,” destroying the Ruhr Valley dams during the wee hours, and earning the nickname “The Dam Busters” |
| 1944 | | Burma: Merrill's Marauders take Myitkina airfield in a coup de main. |
| 1944 | | The Royal Navy and USAF bombers conduct a nocturnal raid on Japanese positions Surabaya, Java |
| 1945 | | British destroyers sank the Japanese cruiser 'Haguro' in the Malacca Str., the last notable surface action of World War II. |
| 1974 | | Protestant Ulster "Unionist" terrorists detonate four bombs in the Irish Republic, 33 die, including children. |
| 1980 | | Race riot in Miami, 16 killed, c. 300 injured |
| 1987 | | USS 'Stark' (FFG-31) hit by Iraqi missiles, 37 sailors die |
| 2006 | | USS 'Oriskany' (CV-34) is sunk as a reef in the Gulf of Mexico |