Armenian–Azerbaijani War Part of World War I and the Russian Civil War Date 30 March 1918–28 November 1920 (2 years, 7 months, 4 weeks and 1 day) Location Armenia and Azerbaijan Result Soviet victory; Sovietization of Armenia and Azerbaijan Territorial changes Disputes over Karabakh and Nakhichevan settled in favor of Soviet Azerbaijan; Zangezur gained by Soviet Armenia Belligerents First Republic of Armenia Republic of Mountainous Armenia Armenian militia Battle of Baku only: United Kingdom Centrocaspian Dictatorship Azerbaijan Democratic Republic Ottoman Empire After April 1920: Russian SFSR Turkish Revolutionaries Azerbaijan SSR Commanders and leaders Andranik Ozanian Drastamat Kanayan Lionel Dunsterville Samedbey Mehmandarov Khosrov bey Sultanov Anatoliy Gekker Strength Dunsterforce (1,000 elite British troops) Unknown