Timeline of Mongolian history

1911: Mongolia declares independence under Bogd Khan. It also becomes a puppet state/protectorate under the Russian Empire.
1913: Mongolia signs a treaty with Tibet.
1919: Mongolia occupied by the Republic of China
February 1921: Baron Ungern drives Chinese troops out of Urga and becomes Mongolian dictator
March 13, 1921: Provisional Government declares independence of Mongolia
Spring-Summer 1921: Damdin Sühbaatar with help of the Red Army defeats Ungern's forces in Mongolia
May 31, 1924: U.S.S.R. signs agreement with Peking government, referring to Inner Mongolia as an "integral part of the Republic of China," whose sovereignty therein the Soviet Union promises to respect.
May-September 16, 1939: Large scale fighting takes place between Japanese and Soviet-Mongolian forces along Khalkhyn Gol on Mongolia-Manchuria border (Battle of Halhin Gol), ending in defeat of the Japanese expeditionary force. Truce negotiated between U.S.S.R. and Japan.
October 6, 1949: Newly established People's Republic of China accepts recognition of Mongolia and agrees to establish diplomatic relations.
October 1961: Mongolia becomes a member of the United Nations.
January 27, 1987: Diplomatic relations established with the United States.
December 1989: First popular reform demonstrations. Mongolian Democratic Association organized.
January 1990: Large-scale demonstrations demanding democracy held in sub-zero weather.
March 2, 1990: Soviets and Mongolians announce that all Soviet troops will be withdrawn from Mongolia by 1992.
May 1990: Constitution amended to provide for multi-party system and new elections.
July 29, 1990: First democratic elections held.
September 3, 1990: First democratically elected People's Great Hural takes office.
February 12, 1992: New constitution goes into effect.
April 8, 1992: New election law passed.
June 28, 1992: Election for the first unicameral legislature (State Great Hural).
June 6, 1993: First direct presidential election.
June 30, 1996: Election of first noncommunist government.
July 2, 2000: Election of the former communist Mongolian People's Revolutionary Party (MPRP); formation of new government by Prime Minister Nambaryn Enhbayar.