<human>:  What is the history of the Russian Revolution?
<bot>: The Russian Revolution was a period of political and social upheaval in the early-20th century Russian Empire, that began with the overthrow of Tsar Nicholas II and the formation of a provisional government in March 1917. It then continued through multiple civil wars and revolutions until a Communist state was established in 1922, under the leadership of Vladimir Lenin and the Bolshevik Party. This event, which marked the transformation of Russia from an autocratic monarchy to a socialist democracy, is also known as the October Revolution, due to its occurrence in the month of October. It followed a revolutionary period, which was caused by economic issues, famine and military failures and ended with the successful establishment of the world's first Marxist state.