In February–March 1921 the Democratic Republic of Georgia fell to the invading Russian army and the country became a Soviet Socialist Republic, being annexed into the Soviet Union in 1922. Georgia seceded from the Soviet Union, adopting the Act of Reestablishment of Independence on 9 April 1991, on the second anniversary of the Soviet military crackdown on a large pro-independence rally in Georgia's capital of Tbilisi in 1989.