Question

In the early 1900s, after the Bolsheviks began to rule Russia

Answer 1

The fight for power resulted in a three-year civil war" is correct. This was happening at the same time as WWII and forced the Russians to withdraw from the conflict. 

Answer 2

In the early 1900s, after the Bolsheviks began to rule Russia , the fight for power resulted in a three-year civil war.

The Bolsheviks constituted a faction established by Vladimir Lenin along with Alexander Bogdanov that split from the Menshevik faction of the Marxist Russian Social Democratic Labour Party (RSDLP) at its Second Party Congress in 1903.

By 1905, The Bolsheviks were a highly important organization made mainly of workers under a democratic internal hierarchy governed by the principle of democratic centralism.