France, the United Kingdom, United States, Belgium, Romania, Czechoslovakia, Italy and Serbia. December December 1 – The Mexican Revolution effectively ends with a new regime coming to power, which coincides with the end of the Old West. December 3 – Following more than a month of the Turkish–Armenian War, the Turkish-dictated Treaty of Alexandropol is concluded. December 5 – A referendum in Greece is favorable to the reinstatement of the monarchy. December 10 – Irish War of Independence: Martial law is declared in Counties Cork, Kerry, Limerick and Tipperary. December 11 – Burning of Cork in Ireland: British forces set fire to some of the centre of Cork, including the City Hall, in reprisal attacks, after a British auxiliary is killed in a guerilla ambush. December 13 – Confectionery company Haribo is founded in Bonn, Germany. December 15–22 – The Brussels Conference establishes a timetable for German war reparations, intended to extend for over 42 years. December 16 An 8.6 Richter scale Haiyuan earthquake causes a landslide in Gansu Province, China, killing 180,000. Finland joins the League of Nations. December 17 – South Africa is granted a League of Nations Class C mandate over South West Africa. December 22 – The 8th Congress of Soviets of the Russian SFSR adopts the GOELRO plan, the major scheme for the economic development of the country. December 23 The United Kingdom and France ratify the border between French-held Syria and British-held Palestine. The Government of Ireland Act 1920, passed by the Parliament of the United Kingdom, receives Royal Assent from George V, providing for the partition of Ireland into Northern Ireland and Southern Ireland, with separate parliaments, granting a measure of home rule. December 25 – The Rosicrucian Fellowship's spiritual healing temple The Ecclesia is dedicated at Mount Ecclesia, Oceanside, California. Date unknown Hydrocodone, a narcotic analgesic closely related to codeine, is first synthesized in Germany, by Carl Mannich and Helene Löwenheim. Approximate date – The HIV/AIDS pandemic almost certainly originates in Léopoldville, modern-day Kinshasa, the capital of the Belgian Congo. Births January January 2 Isaac Asimov, American author (d. 1992) George Herbig, American astronomer (d. 2013) Anne-Sofie Østvedt, Norwegian resistance leader (d. 2009) January 4 – David Musuguri, Tanzanian soldier and military officer January 5 – Arturo Benedetti Michelangeli, Italian pianist (d. 1995) January 6 Sun Myung Moon, Korean evangelist, founder of the Unification Church (d. 2012) John Maynard Smith, English biologist