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  "Anonymous" seal of Simeon I
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  Pyotr Ilyich Tchaikovsky
• 1812 Overture
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  Statue of St. Stephen of Hungary
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  NS Savannah
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  Voyager Spacecraft
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  Yellowstone fires
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• 636 – Rashidun forces led by Khalid ibn al-Walid took control of Syria and Palestine in the Battle of Yarmouk, marking the first great wave of Muslim conquests.
• 1707 – The first Siege of Pensacola came to an end with the British and Creek abandoning their attempt to capture Pensacola in Spanish Florida.
• 1710 – War of the Spanish Succession: The Spanish- Bourbon army commanded by the Marquis de Bay was soundly defeated by a multinational army led by the Austrian commander Guido Starhemberg.
• 1794 – American troops defeated the Western Confederacy, a Native American alliance, at the Battle of Fallen Timbers, the decisive battle of the Northwest Indian War.
• 1909 – Pluto was photographed for the first time at the Yerkes Observatory in Williams Bay, Wisconsin, U.S., 21 years before it was officially discovered by Clyde Tombaugh.
• 1910 – Hurricane-force winds combined hundreds of small fires in the U.S. states of Washington and Idaho into the Devil's Broom fire, which burned about three million acres (12,140 km²), the largest fire in recorded U.S. history.
• 1962 – NS Savannah, the first nuclear-powered cargo-passenger ship, made her maiden voyage.
• 1988 – Fires in the United States' Yellowstone National Park ravaged more than 150,000 acres (610 km²), the single-worst day of the conflagration.
• 1988 – The Troubles: The Provisional Irish Republican Army bombed a bus carrying British Army soldiers in Northern Ireland, killing eight of them and wounding another twenty-eight.
• 1989 – The final stage of the O-Bahn Busway in Adelaide, South Australia, was completed, at the time the world's longest and fastest guided busway with buses travelling a total of 12 km (7.5 mi) at maximum speeds of up to 100 km/h (62 mph).
• 1989 – After a collision with a dredger on the River Thames in London, the pleasure boat Marchioness sank in just thirty seconds, killing 51 people.
• 1998 – The Al-Shifa pharmaceutical factory in Sudan was destroyed by a missile attack launched by the United States in retaliation for the August 7 U.S. embassy bombings.
• Born/died: | Jeremi Wiśniowiecki |d|1651| Henry Every |b|1659| James Prinsep |b|1799| Rudolf Bultmann |b|1884| Terry Sanford |b|1917| Ron Paul |b|1935| Phil Lynott |b|1949| Amy Adams |b|1974| Andrew Garfield |b|1983| Jack King |b|1985| Leona Helmsley |d|2007| Mika Yamamoto |d|2012| Narendra Dabholkar |d|2013

• 1998 United States embassy bombings appears on August 7, so Operation Infinite Reach should not appear in the same year
• The Hardest Day appears on August 18, so Churchill's speech should not appear in the same year
• Omagh bombing appears on August 19, so Ballygawley bus bombing should not appear in the same year