Wikipedia:Selected anniversaries/September 17
September 17: Respect for the Aged Day in Japan (2007); Constitution Day and Citizenship Day in the United States.
- 1862 – American Civil War: Almost 23,000 total casualties were suffered at the Battle of Antietam near Sharpsburg, Maryland, where Confederate and Union troops fought to a tactical stalemate.
- 1894 – The Imperial Japanese Navy defeated the Beiyang Fleet of Qing China in the Battle of the Yalu River at the mouth of the Yalu River in Korea Bay, the largest naval engagement of the First Sino-Japanese War.
- 1916 – World War I: "The Red Baron", a flying ace of the German Luftstreitkräfte, won his first aerial combat near Cambrai, France.
- 1978 – President Anwar Al Sadat of Egypt and Prime Minister Menachem Begin of Israel (pictured with U.S. President Jimmy Carter) signed the Camp David Accords after twelve days of secret negotiations at Camp David.
- 2001 – The Dow Jones Industrial Average opened for the first time after the September 11 attacks. However, the stock market index posted its biggest point drop in its history closing down 684.81 points to 8920.70.
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