That country is trying to expand their sphere of influence.

I think his ideas are revolutionary.

He was a true revolutionary, aiming for social reform.

The Industrial Revolution greatly changed the world's economy.

The Russian Federation has a vast territory.

He has many Russian friends.

He can speak Russian fluently.

He played Russian roulette, risking his life.

He has experienced the harsh winter of fearsome Russia.

The Russian Empire was a nation that existed from 1721 to 1917.