Conversation so far:
when did the communist revolution in russia take place
The Russian Revolution was a period of sociopolitical revolution across the territory of the Russian Empire, commencing with the abolition of the monarchy in 1917, and concluding in 1923.
what country was created from the russian revolution
The Russian Revolution concluded in 1923 after the Bolshevik establishment of the Soviet Union, including national states of Ukraine, Azerbaijan and others, and the end of the Civil War.

Question: how long did the country exist
Self-contained rewrite: how long did the soviet union exist