This is our main goal.

He played a central role in the project.

The Bolsheviks were a major force in the Russian Revolution.

The Bolsheviks were a major force in the Russian Revolution.

His influence is spreading in this region.

He sparked a revolution in science.

I have been to Russia.

He can speak Russian fluently.

He has many Russian friends.

If the balance of power in this region is disrupted, there is a possibility of major turmoil.