| 0 | | International Youth Day and World Elephant Day |
| 0 | | Air Force Day and Railway Troops Day in Russia |
| 0 | | Feast of Saint Euplius of Catania, Martyr, Co-Patron with Saint Agatha, of Catania |
| 1071 | | Seljuk Turks inflicted a devastating defeat on the Byzantines in the Battle of Manzikert, capturing Emperor Romanus IV |
| 1099 | | Battle of Ascalon: Crusaders defeat the Fatimids |
| 1332 | | Battle of Dupplin Moor: Edward Valiol's English defeat King David of Scots |
| 1499 | | First Naval Battle of Sapienza: Turks & Venetians clash |
| 1553 | | Pope Julius III orders confiscation & burning of Jewish religious books |
| 1554 | | Battle of Renty: Imperialists defeat the French |
| 1645 | | The Massachusetts Council orders a third of the men in each militia company "be ready on half an hour's warning for any service" - the first "Minute Men" |
| 1687 | | Battle of Harkany/Mohacs: Charles V of Lorraine routs the Turks |
| 1744 | | Battle of Velletri II: Charles IV's Neapolitans defeat the Austrians |
| 1759 | | Battle of Kunersdorf: Russo-Austrian forces almost defeat Frederick the Great |
| 1762 | | The British captured Havana after a 40 day siege -- Learn More |
| 1805 | | the Lewis & Clark Expedition crossed the Continental Divide |
| 1806 | | Fra Diavolo landed near Salerno with 500 men, to initiate guerrilla operations against the French in support of the defense of Gaeta -- Learn More |
| 1812 | | Battle of Gorodeczno: French and Austrians defeat the Russians |
| 1812 | | USS 'Constitution' captures and destroys British brig 'Adeona' |
| 1812 | | Wellington's troops enter Madrid |
| 1831 | | The Dutch evacuated Belgium under French pressure -- Learn More |
| 1862 | | John Hunt Morgan's Confederate raiders capture Gallatin, Tn |
| 1898 | | US & Spanish troops skirmish at Aibonito Pass, Puerto Rico |
| 1898 | | US Navy raids Manzanillo, Cuba |
| 1898 | | US ships and Spanish batteries exchange fire at Santiago |
| 1905 | | Pogrom at Bialystock, 36 Jews die |
| 1914 | | Battle of Haelen: Belgian Carabineers temporarily halt German advance |
| 1914 | | Great Britain declares war on Austria-Hungary |
| 1927 | | Premiere of William Wellman's movie 'Wings', which would win the first 'Oscar' for best picture |
| 1941 | | French Marshal Henri Petain gives full support to Nazi Germany |
| 1942 | | German First Panzer Armee captures Elista, southeast of Stalingrad |
| 1942 | | Guadalcanal: First US airplane reaches Henderson Field |
| 1942 | | New Guinea: Japanese troops reach the crest of the Owen Stanley Mtns as a convoy lands reinforcements at Buna. |
| 1942 | | U.S. destroyer-transports land supplies on Guadalcanal. |
| 1943 | | Kiska: USAAF bombs and USN shells suspected Japanese positions |
| 1943 | | The alleged "Philadelphia Experiment": The US Navy supposedly successfully "cloaks" the USS "USS Eldridge" (DE 173) -- or maybe in October. |
| 1944 | | Normandy: PLUTO (pipeline under ocean) begins operating |
| 1944 | | SS massacres hundreds of civilians at Sant'Anna di Stazzema, Tuscany |
| 1945 | | Leaflets call for Japan to surrender or face "utter devastation." |
| 1953 | | Soviet Union conducts secret hydrogen bomb test |
| 1959 | | First firing of a Polaris missile from a ship, 'Observation Island' |
| 1962 | | Russia launches Vostok 4, with Pavel Popovich, who lands safely Aug 15 |
| 1972 | | Last American ground troops leave Vietnam |
| 1983 | | Manuel Noriega becomes commander of Panamanian Army |
| 1503 | | King Christian III of Denmark & Norway (1534-59) |
| 1762 | | King George IV of England (1820-30) |
| 1819 | | Daniel Davidson Bidwell, Brig Gen, U.S., kia 1864 |
| 1829 | | John Horace Forney, Maj Gen, C.S.A., d. 1902 |
| 1833 | | William Price Sanders, Brig Gen, U.S., kia 1863 |
| 1870 | | Hubert de la Poer Gough, British soldier, Commander, Fifth Army in the BEF, d. 1963 |
| 1904 | | The Tsarevich Aleksei of Russia, murdered, 1918 |
| 1909 | | Maurice Heath, air marshal, RAF, d. 1998 |
| 30 | BC | Queen Cleopatra VII of Egypt (51-30 BC), 39, asped |
| 238 | | Roman co-Emperors (Mar 22-Aug 12, 138), Gordian II (c. 46), kia outside Carthage, and his father, Gordian I (c. 78), suicide at Carthage on hearing the news -- Learn More |
| 1350 | | King Philip VI "the Fortunate" of France (1328-1350), c. 57 |
| 1484 | | Pope Sixtus IV - Francesco della Rovere (1471-1484), 70 |
| 1676 | | Metacom - "King Philip" - Sachem of the Wampanoag (1662-1676), shot by Colonial militiaman John Alderman, a "Praying Indian" |
| 1811 | | Sir John Francis Edward Acton, 6th Baronet Acton, Tuscan admiral, Neapolitan Minister of War & Marine (1778-1804), at 75 |
| 1914 | | John Philip Holland, 74, Fenian, submarine designer |
| 1935 | | MajGen Tetsuzan Nagata, 51, murdered in his headquarters by "Imperial Way" fanatic Lt Col Saburo Aizawa |
| 1964 | | Ian Fleming, British officer and novelist ("James Bond"), at 56 |
| 1982 | | Henry Fonda, sometime naval officer, actor ("Mr. Roberts," etc.), at 77 |
| 1990 | | USAF SSGT John Campisi, struck by a truck - the first American to die in the Gulf War |
| 2012 | | Joe Kubert, 86, sometme soldier, American cartoonist ("Sgt. Rock", "Hawkman", etc.) |