September 20Margaret Thatcher1066 HaraldIII of Norway and his English ally Tostig Godwinson defeated the northern earls Edwin and Morcar at the Battle of Fulford near York.1697 The first of a series of treaties comprising the Peace of Ryswick was signed between France and the Grand Alliance, ending the Nine Years' War.1870 The Bersaglieri entered Rome through the Porta Pia, ending the temporal power of the Pope and completing the unification of Italy.1920 Irish War of Independence: British auxiliary police officers known as Black and Tans went on a rampage in Balbriggan, burning more than fifty homes and businesses and killing two people.1988 British prime minister Margaret Thatcher (pictured) gave a landmark speech at the Belfry of Bruges, Belgium, against federalism in the European Economic Community.Gozbald (d.855)Jacob Grimm (d.1863)Justo Gallego Martnez (b.1925)Rose Francine Rogomb (b.1942)More anniversaries: September 19September 20September 21ArchiveBy emailList of days of the yearAbout