On this day in 2001, 19 militants associated with the terrorist group al-Qaeda hijacked four planes in the United States, crashing three into buildings (the fourth crashed in Pennsylvania) and killing some 3,000 people.
| 1973: | | General Augusto Pinochet led a coup d'état, overthrowing the government of President Salvador Allende of Chile. |
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| 1944: | | Winston Churchill and Franklin D. Roosevelt met in Canada at the second Quebec Conference. |
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| 1855: | | The 11-month Siege of Sevastopol ended after British and French troops finally captured the main naval base of the Russian Black Sea fleet during the Crimean War. |
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| 1814: | | U.S. naval forces under Thomas Macdonough defeated a larger British force at the Battle of Lake Champlain during the War of 1812. |
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| 1777: | | British forces defeated the Americans at the Battle of the Brandywine during the American Revolution. |
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| 1709: | | The duke of Marlborough led a British army of 100,000 men against a French army of 90,000 at the Battle of Malplaquet in the War of the Spanish Succession. |
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| 1697: | | Austrian forces won a decisive victory over an Ottoman army at the Battle of Zenta. |
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