| 0 | | Army Day in Brazil |
| 0 | | Patriots' Day in the United States and in Uruguay |
| 0 | | Feast of St. Expeditus the Centurion, Martyr and Patron of Navigators |
| 26 | | The Crucifiction [Alt Trad] |
| 65 | | The betrayal of the Pisonian Conspiracy against Nero |
| 530 | | Belisarius's East Romans were defeated by the Persians in the Battle of Callenicum -- Learn More - |
| 1451 | | Sultan Alam I (Ala-ud-Din Alam Shah) of Delhi (1445-1451) voluntarily abdicates in favor of Bahlul Khan Lodhi (1451-1489) |
| 1587 | | Frances Drake raided Cadiz, burning stores and ships earmarked for the Armada -- Learn More |
| 1775 | | "The Shot Heard 'Round the World" was fired at the Battles of Lexington & Concord |
| 1782 | | The Netherlands recognizes the US |
| 1783 | | Congress orders hostilities with Britain at an end, eight years after "The Shot Heard 'Round the World." |
| 1809 | | Battle of Teugen: The French defeat the Austrians |
| 1825 | | Juan Antonio Lavalleja and 32 other exiles land in Uruguay to initiate the war for independence from Brazil |
| 1859 | | Lombardy-Venetia War: Austria demands that Piedmont disarm. |
| 1861 | | The Baltimore Riots: Secessionist mobs attack the 6th Mass ( 4 soldiers, c. 12 rioters killed) and Rabbi David Einhorn, who had delivered an anti-slavery sermon |
| 1861 | | Lincoln orders blockade of Confederate ports |
| 1909 | | Canonization of Joan of Arc, patron of France, Soldiers, & Women in Military Service |
| 1919 | | Leslie Irvin of the US makes 1st free fall parachute jump |
| 1928 | | Japanese troops occupy Shantung Peninsula in China |
| 1936 | | Anti-Jewish rioting in Palestine |
| 1941 | | Bulgarian troops occupy Macedonia |
| 1941 | | US Marines begin construction of an airfield on Wake Island |
| 1941 | | Nazis initiate milk rationing in the Netherlands |
| 1942 | | British abandon the oil fields at Yenangyuang, Burma |
| 1943 | | USS 'Scorpion' (SS-278) initiates mining of Japanese home waters |
| 1943 | | Warsaw Ghetto Uprising begins; lasts until May 16 |
| 1944 | | Japan reinforces drive against U.S. airbases in China. |
| 1944 | | New York: Massive rally protesting Nazi genocide. |
| 1945 | | Italian UDT sink incomplete aircraft carrier 'Aquila', in German hands at Genoa |
| 1945 | | US offensive opens against the Shuri Line on Okinawa |
| 1948 | | Chiang Kai-shek elected president of Nationalist China |
| 1959 | | Abortive uprising at La Paz, Bolivia |
| 1962 | | NASA pilot Joseph A Walker takes X-15 to 46,900 m |
| 1964 | | Rightist coup in Laos, Suvanna Phuma remains premier |
| 1971 | | USSR Salyut 1 launched; 1st manned lab in orbit |
| 1989 | | a turret explosion aboard the USS 'Iowa' (BB 61), killed 47 sailors -- Learn More |
| 1990 | | Truce ends the Nicaraguan Civil War |
| 1995 | | a self-proclaimed "patriot" killed 168 Americans in Oklahoma City |
| 1320 | | King Pedro I of Portugal (1357-67) |
| 1603 | | Michel Le Tellier, marquis de Barbezieux, war minister, chancellor to Louis XIV, d. 1685 |
| 1757 | | Admiral Edward Pellew, 1st Viscount Exmouth, GCB, sea dog, d. 1833 |
| 1787 | | Erastus "Deaf" Smith, American frontiersman, Texian revolutionary, d. 1837 |
| 1793 | | Ferdinand I, Emperor of Austria, etc., etc., (1835-1848), abdicated, d. 1875 |
| 1821 | | Mortimer Dormer Leggett, Maj Gen, U.S., d. 1896 |
| 1883 | | Getulio Vargas, fascistic dictator/president of Brazil (1930-45, 1951-54), suicide 1954 |
| 1905 | | John Smith "Jimmy" Thach, naval aviator, innovative tactician, d. 1981 -- Learn More |
| 1922 | | Erich Alfred Hartmann, German fighter ace (352 kills), later Bundeswehr airman, d. 1993 |
| 1054 | | Pope St. Leo IX (1049-1054), 51, the former Count Bruno of Egesheim-Dagsburg |
| 1390 | | King Robert II "the Steward" of Scotland (1371-1390), 74 |
| 1689 | | Christina, 62, who abdicated as Queen of Sweden (1632-54), in Rome |
| 1779 | | The Rev. James Hackman, c. 28, sometime subaltern of the 68th Foot, hanged at Tyburn for the murder on Apr 7th of Martha Ray, mistress to First Lord of the Admiralty the Earl of Sandwich |
| 1881 | | Benjamin Disraeli, 76, Earl of Beaconsfield, novelist, PM of the UK, 1868 and 1874–1880 |
| 1882 | | Charles Darwin, 73, scientist, author ("On the Origin of Species", etc.) |
| 1886 | | Bishop Narciso Martinez Izquierdo of Madrid (56), shot by a disgruntled priest |
| 1956 | | Lionel "Buster" Crabb, British diver (47), last seen alive on this day, after secretly diving in Porsmouth harbor to examine the hull of a visiting Soviet cruiser |
| 1987 | | Maxwell D Taylor, commander 101st Airborne Division in WW II, at 85 |
| 1989 | | Daphne du Maurier, author ("The Birds"), wife to Sir Frederick Browning of the Paras, at 81 |
| 2009 | | Ray Nance (94), last of 30 men from Bedford, Virginia, who landed on Omaha on D-Day with Co. A, 116th Infantry, 22 of whom never got off the beach |