Answer:
November 1917
After forming their own party in 1912, the bolsheviks took power in Russia in November 1917, overthrowing the republican government, and became the only ruling party in the subsequent Soviet Russia and the Soviet Union.
Answer: On Nov. 7, 1917, Russia's Bolshevik Revolution took place as forces led by Vladimir Ilyich Lenin overthrew the provisional government of Alexander Kerensky. The provisional government came to power after the February Revolution resulted in the Russian monarchy being overthrown in March 1917.
Explanation: hope this helped:)
