September 17 - On this Day

2010 – Yom Kippur begins at sunset (Judaism); Constitution Day in the United States.
1176 – Byzantine–Seljuk wars: TheSeljuk Turks prevented the Byzantinesfrom taking the interior of Anatolia at the Battle of Myriokephalon inPhrygia.
1787 – The text of the United States Constitution was finalized at the Constitutional Convention in Philadelphia.
1894 – The Imperial Japanese Navy defeated theBeiyang 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: Manfred von Richthofen ("The Red Baron"), a flying ace of the German Luftstreitkräfte, won his first aerial combat near Cambrai, France.
1939 – World War II: The Soviet Union invaded Polandfrom the east, sixteen days after Nazi Germany's attack on that country from the west.
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 atCamp David.