| 0 | | Feast of St. Irene of Macedonia, Great Martyr, Patron of Police Officers, and that of St. Jutta of Kulmsee, Patroness of Prussia |
| 0 | | "Cinco de Mayo" Day in Puebla, Mexico, and the United States |
| 614 | | the Persians took Jerusalem amidst great slaughter, & captured the "True Cross" -- Learn More |
| 1010 | | Battle of Ringmere: The Danes defeat Ulfkell Snilling of Norfolk |
| 1405 | | Battle of Pwllmelyn: English defeat Owen Glendower & the Welch |
| 1430 | | Jews are expelled from Speyer, Germany |
| 1576 | | Peace of Beaulieu: restores the government of Picardy to the Protestant Prince de Condé |
| 1646 | | King Charles I surrenders in Scotland |
| 1769 | | Battle of Porto Nuovo: The French defeat Pasquale Paoli, securing control of Corsica |
| 1789 | | French King Louis XVI calls for the convening the Etats Genereaux, for the first time since 1614 |
| 1797 | | Napoleon's sister Elisa marries Prince Felix Bacciochi |
| 1809 | | Canton Aargau, Switzerland, denies citizenship to Jews |
| 1814 | | British attack Ft Ontario, Oswego, NY |
| 1833 | | Turks cede Crete and Syria to Mehemet Ali of Egypt |
| 1860 | | Garibaldi and the Thousand sail from Quarto for Sicily |
| 1861 | | Confederate troops abandon Alexandria, Va. |
| 1862 | | Cinco de Mayo: Mexican forces defeat the French at Puebla |
| 1862 | | Peninsular Campaign: Battle of Williamsburg, VA |
| 1864 | | Battle of the Wilderness: Germanna Ford/Wilderness Tavern |
| 1866 | | Guano War: the Spanish fleet bombards Callao, Peru |
| 1891 | | Official opening of Carnegie Hall, with a program by Walter Damrosch and Peter Ilyich Tchaikovsky |
| 1908 | | The Great White Fleet reaches San Francisco |
| 1913 | | The Great Powers force Montenegro to withdraw from Scutari, which is occupied by peace keeping troops |
| 1920 | | Polish troops capture Kiev |
| 1938 | | Mussolini and Hitler review the Italian fleet in the Bay of Naples |
| 1940 | | Norwegians form a government-in-exile in London |
| 1941 | | Emperor Haile Selassie returns to Addis Ababa |
| 1942 | | British land at Diego Suarez, Vichyite naval base in Madagascar. |
| 1942 | | Burma: British forces evacuate Akyab. |
| 1942 | | Philippines: Japanese troops land on Corregidor |
| 1942 | | Southwest Pacific: Japanese carriers 'Zuikaku' & 'Shokaku' enter the Solomons Sea, as 'Yorktown' (CV-5) & 'Lexington' (CV-2) rendezvous in the Coral Sea |
| 1942 | | US begins rationing sugar during WW II |
| 1944 | | British release Mahatma Ghandi, imprisoned since August 1942 |
| 1945 | | Okinawa: 131 Kamikaze sink 17 ships |
| 1945 | | a Japanese balloon bomb killed a pregnant woman and five children in Oregon -- Learn More |
| 1945 | | the Polish 10th Armoured Brigade captured Wilhelmshaven -- Learn More |
| 1945 | | German troops in the Netherlands surrender to the Allies |
| 1952 | | Herman Wouk's "The Caine Mutiny" wins the Pulitzer Prize |
| 1954 | | Paraguay: Military coup installs General Alfredo Stroessner as dictator/president (1954-1989) |
| 1961 | | Alan Shepard makes a suborbital flight in Freedom 7 |
| 1964 | | Separatist riot in Québec |
| 1965 | | First large US ground units arrive in South Vietnam |
| 1985 | | Bitburg Germany: President Reagan & Chancellor Kohl lay a wreath at a memorial marking the graves of nearly 2,000 German and Allied personnel |
