WHAT HAPPENED ON 20. JANUARY
Want to find out what all happened on 20. January

Emperor Decius begins a widespread persecution of Christians in Rome. Pope Fabian is martyred. (20. January 250)

King Chindasuinth, at the urging of bishop Braulio of Zaragoza, crowns his son Recceswinth as co-ruler of the Visigothic Kingdom. (20. January 649)

In Westminster, the first English parliament conducts its first meeting held by Simon de Montfort in the Palace of Westminster, now also known colloquially as the "Houses of Parliament". (20. January 1265)

Duke Wladyslaw Lokietek becomes king of Poland. (20. January 1320)

Edward Balliol abdicates as King of Scotland. (20. January 1356)

Christian II is forced to abdicate as King of Denmark and Norway. (20. January 1523)

Battle of Rio de Janeiro: Portuguese forces under the command of Estácio de Sá definitively drive the French out of Rio de Janeiro. (20. January 1567)

The Mexican city of León is founded by order of the viceroy Don Martín Enríquez de Almanza. (20. January 1576)

Charles I of England goes on trial for treason and other "high crimes". (20. January 1649)

The Kingdom of Great Britain signs a peace treaty with France and Spain, officially ending hostilities in the American Revolutionary War (also known as the American War of Independence). (20. January 1783)

Invading Siamese forces attempt to exploit the political chaos in Vietnam, but are ambushed and annihilated at the Mekong River by the Tay Son in the Battle of Rạch Gầm-Xoài Mút. (20. January 1785)

The third and main part of First Fleet arrives at Botany Bay. Arthur Phillip decides that Botany Bay is unsuitable for the location of a penal colony, and decides to move to Port Jackson. (20. January 1788)

In the Battle of Yungay, Chile defeats an alliance between Peru and Bolivia. (20. January 1839)

Hong Kong Island is occupied by the British. (20. January 1841)

Last day of the Constantinople Conference which resulted in agreement for political reforms in the Balkans. (20. January 1877)

The United States Senate allows the Navy to lease Pearl Harbor as a naval base. (20. January 1887)

The American Civil Liberties Union is founded. (20. January 1920)

The first Constitution of Turkey is adopted, making fundamental changes in the source and exercise of sovereignty by consecrating the principle of national sovereignty. (20. January 1921)

In Old Arizona, the first full-length talking motion picture filmed outdoors, is released. (20. January 1929)

Edward VIII becomes King of the United Kingdom. (20. January 1936)