1493 - Battle of Krbava Field: Ottoman Empire decisively defeats an army of the Kingdom of Croatia 1914 - First fully mechanized unit in the British Army is created: the Canadian Automobile Machine Gun Brigade (WWI) 1932 - Mine strike at Belgian Borinage ends 1944 - The Red Army supports a coup in Bulgaria, instituting a new Communist government (1946-1990) during the "National Uprising" 1964 - German Democratic Republic government allows short visits to West Germany 2006 - US Open Women's Tennis: Maria Sharapova of Russia wins her first US title; overpowers Belgian Justine Henin-Hardenne 6-4, 6-4 2012 - US Open Women's Tennis: Serena Williams wins her fourth US title, beating Victoria Azarenka of Belarus 6-2, 2-6, 7-5 2015 - Queen Elizabeth II becomes Great Britain's longest-reigning monarch at 63 years and seven months, beating the previous record set by her great-great-grandmother, Queen Victoria More Historical Events »