- August 7, 0322 BC – Battle of Crannon between Athens and Alexander the Great of Macedon.
- August 7, 0768 Stephen III begins his reign as Catholic Pope
- August 7, 1461 “the Ming Dynasty Chinese military general Cao Qin stages a coup against the Tianshun Emperor; after setting fire to the eastern and western gates of the Forbidden City (which were doused by pouring rains during the day-long uprising), Cao Qin found himself hemmed in on all sides by imperial forces, lost three of his own brothers in the fight, and instead of facing execution he fled to his house and committed suicide by jumping down a well located within the walled compound of his urban Beijing home.”
- August 7, 1498 Columbus arrives in Caribbean
- August 7, 1620 Kepler’s mother arrested for witchcraft
- August 7, 1679 “The brigantine Le Griffon, commissioned by Ren Robert Cavelier, Sieur de La Salle, is towed to the south-eastern end of the Niagara River, to become the first ship to sail the upper Great Lakes of North America.”
- August 7, 1714 The first important victory of the Russian Navy – the Battle of Gangut.
- August 7, 1782 Badge of US Military Merit (Purple Heart) established by George Washington
- August 7, 1782 George Washington orders the creation of the Badge of Military Merit to honor soldiers wounded in battle. It is later renamed to the more poetic Purple Heart.
- August 7, 1789 The United States War Department is established.
- August 7, 1789 US War Department established
- August 7, 1794 Whiskey Rebellion begins: Farmers in the Monongahela Valley of Pennsylvania rebel against the federal tax on liquor and distilled drinks.
- August 7, 1819 Battle of Boyac ; Bol?var defeats Spanish in Colombia
- August 7, 1819 Simn Bolvar triumphs over Spain in the Battle of Boyac.
- August 7, 1820 First potatoes planted in Hawaii
- August 7, 1879 The opening of the Poor Man’s Palace in Manchester.
- August 7, 1882 “Hatfields of south WV & McCoys of east Ky feud, 100 wounded. Many dead.”
- August 7, 1888 Patent for revolving door granted
- August 7, 1912 Progressive (Bull Moose) Party nominates Theodore Roosevelt for pres
- August 7, 1915 “Charge of Australian Light Horse Brigade at the Nek, Gallipoli”
- August 7, 1915 “Crpl. Cyril Royston Guyton BASSETT, NZ Divisional Signals, NZ Engineers won the Victoria Cross at Chunuk Bair, on the Gallipoli Peninsula”
- August 7, 1927 “The Peace Bridge opens, between Fort Erie, Ontario and Buffalo, New York.”
- August 7, 1933 “The Iraqi Government slaughtered over 3,000 Assyrians in the village of Sumail. The day becomes Assyrian Martyrs Day.”
- August 7, 1938 2 die in a New York subway accident
- August 7, 1940 Alsace Lorraine is annexed by the Third Reich (Germany) during World War II
- August 7, 1940 “Largest amount paid for a stamp ($45,000 for an 1856 British Guiana)”
- August 7, 1941 551 Jews are shot in Kishnev ghetto in Romania
- August 7, 1944 “German counterattacks at Avranches “”bottleneck.”” Allies successfully defend advances and continue to sweep Brittany.”
- August 7, 1944 “IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator (known best as the Harvard Mark I).”