With the victory of the socialist revolution of November 2, 1917, “Declaration of the people of Russia” was adopted. On May 26, 1918, after self-dismissal of the Transcaucasian Seym which declared about the separation of Transcaucasus from Soviet Russia, Armenia became independent, and on May 28 the National Council announced the Republic of Armenia. Half a year later, disputes with Azerbaijan flared up, and in March 1920 Armenian-Azeri was began. As a result, the ruling power in the country passed to the revolutionary committee. At the negotiations between Armenia and Azerbaijan headed by Stalin, borders of these republics were set.
From March 12, 1922, Armenia was included in the Transcaucasian Federation, and from December 5, 1936 became part of the Union of Soviet Socialist Republics.
Since September 21, 1991, the Republic Armenia is a sovereign democratic, social and legal state headed by a president. Authority is exercised in accordance with the Constitution adopted on July 5, 1995 during the National referendum.