WHAT HAPPENED ON 20. OCTOBER
Want to find out what all happened on 20. October

The city of Nuestra Señora de La Paz (Our Lady of Peace) is founded by Alonso de Mendoza by appointment of the king of Spain and Holy Roman Emperor, Charles V. (20. October 1548)

Relief of Goes, Cristóbal de Mondragón with 3000 soldiers of the Spanish Tercios, release the siege of the city. (20. October 1572)

Caribbean pirate Calico Jack is captured by the Royal Navy. (20. October 1720)

Maria Theresa takes the throne of Austria. France, Prussia, Bavaria and Saxony refuse to honour the Pragmatic Sanction and the War of the Austrian Succession begins. (20. October 1740)

Patent of Toleration, providing limited freedom of worship, is approved in Habsburg Monarchy. (20. October 1781)

The United States Senate ratifies the Louisiana Purchase. (20. October 1803)

The Convention of 1818 signed between the United States and the United Kingdom which, among other things, settles the Canada – United States border on the 49th parallel for most of its length. (20. October 1818)

Battle of Navarino: a combined Turkish and Egyptian armada is defeated by British, French, and Russian naval force in the port of Navarino in Pylos, Greece. (20. October 1827)

Yale, Princeton, Columbia, and Rutgers universities draft the first code of American football rules. (20. October 1873)

Peru and Chile sign the Treaty of Ancón, by which the Tarapacá province is ceded to the latter, bringing an end to Peru's involvement in the War of the Pacific. (20. October 1883)

Chile and Bolivia sign the Treaty of Peace and Friendship, delimiting the border between the two countries. (20. October 1904)

The hull of the RMS Olympic, sister-ship to the ill-fated RMS Titanic, is launched from the Harland and Wolff shipyard in Belfast, Northern Ireland. (20. October 1910)

The Long March, a mammoth retreat undertaken by the armed forces of the Chinese Communist Party a year prior, ends. (20. October 1935)

Pope Pius XII publishes his first major encyclical entitled Summi Pontificatus. (20. October 1939)

World War II: Thousands of civilians in Kragujevac in German-occupied Serbia are murdered in the Kragujevac massacre. (20. October 1941)

The cargo vessel Sinfra is attacked by Allied aircraft at Suda Bay, Crete, and sunk. 2,098 Italian prisoners of war drown with it. (20. October 1943)

The Soviet Army and Yugoslav Partisans liberate Belgrade, the capital of Yugoslavia (20. October 1944)

Liquid natural gas leaks from storage tanks in Cleveland, then explodes; the explosion and resulting fire level 30 blocks and kill 130. (20. October 1944)

American general Douglas MacArthur fulfills his promise to return to the Philippines when he commands an Allied assault on the islands, reclaiming them from the Japanese during the Second World War. (20. October 1944)

Government of the Democratic Republic of Vietnam decides that on 20/10 is Vietnam Women's Day. (20. October 1946)