The Soviet flag was a symbol of Communism.
Communism is a military, and cultural governing system on Earth in the 20th and 21st century, originating from Karl Marx, but was made known mostly by the Soviet Union by Vladmir Lenin and his "Bolshevik" Party. It focusses on teachings from Socialism such as equal wealth and land ownership. Communism was ultimately dissolved in 1992 in most nations of Earth from the result of the Cold War. Howerever, several Communist nations such as North Korea, China, and Cuba survived the fall of the USSR. During the economic difficulties of the early 21st century, Russia and other nations elected Communist governments or overthrough thier governments in Coups. After World War III most of the World is led by semi-Communist government, under the Union of People's Repulics of Russia.