What was the revolutionary group of Russian revolution?

Answer 1

There were two revolutions in Russia in 1917. No particular group led the February Revolution. It started as a spontaneous unorganized demonstration and then general strike against the Tsarist government. Tsar Nicholas II realized he could not restore order because the military would not obey him so he abdicated the throne.

The Bolshevik Party under Vladimir Lenin led the second revolution. This was called the October Revolution or the Bolshevik Revolution.

Answer 2

You are probably thinking the answer is the Bolsheviks under Vladimir Lenin and it is true that they started the October Revolution in Russia. But to answer the question as written, no group in particular "started the Russian revolution."

The revolution consisted of two separate revolutions, the February Revolution and the October Revolution. The February Revolution is considered the start of the revolution of 1917. The Bolsheviks did not start that one, so it is not accurate to say they started the revolution. They did start the second revolution.

While the Bolsheviks did not start the revolution, they certainly finished it.