Today, 107 years ago, on March 10, 1918 (Calendar 28 January 1918), the Soviet capital moved from Petersburg to Moscow. On March 10, 1918, the Soviet government moved from Petrograd to Moscow. Moscow became the capital of Soviet Russia. The Russian capital has been in Petrograd since Peter the Great. After the victory of the October Revolution, German troops invaded the Soviet Union on February 18, 1918, seriously threatening the security of Petrograd. The Soviets decided to move the city.