Answer:
The Russian Revolution was a very important period in the history of Russia, that lasted from 1917 to 1923.
Step-by-step explanation:
In 1917, Russia was in the middle of an economic and military crisis, because it had many setbacks in World War I. This angered the people, and in february the government of the Tsar Nicholas II was overthrown.
The parliament stayed in power until October of the same year, when the Bolsheviks, led by Vladimir Lenin, took power, executed the Tsar, and dissolved the parliament.
After that, Russia was embroiled in a civil war between the communists and the reactionaries, and by 1923, the war had been won by the former, and the Soviet Union had been established.