Short answers, pulled from the story.
The word communism derives from the French term communiste, which combines the Latin root communis meaning common with the suffix -isme indicating a state or practice. This semantic construction translates to of or for the community and describes an abstraction into a condition of action.
Vladimir Lenin's Bolsheviks seized power in Russia through the October Revolution of 1917, marking the first time any avowedly communist party reached that position. The revolution transferred authority to the All-Russian Congress of Soviets where the Bolsheviks held a majority.
Marxist-Leninist governments modeled on the Soviet Union took power with assistance in Bulgaria Czechoslovakia East Germany Poland Hungary and Romania after World War II. Josip Broz Tito created an independent Marxist-Leninist state in Yugoslavia that was expelled from Cominform in 1948 following the Tito-Stalin split.
Mao Zedong's government caused vast numbers of deaths with estimates ranging from 40 to 80 million victims through starvation persecution prison labor and mass executions. The years between 1953 and 1983 showed negative growth only during 1958 through 1961 when China's economy experienced regression.
Leon Trotsky founded the Fourth International in 1938 as a rival to Comintern before his assassination in Mexico City on the 14th of August 1940 on Stalin's orders. Trotsky claimed the Soviet Union became a degenerated workers state under Stalin where class relations re-emerged in new form.
The Soviet Union dissolved on the 26th of December 1991 following declaration number 142-N of the Supreme Soviet. Mikhail Gorbachev resigned as president on the previous day handing control of Cheget to Boris Yeltsin.