Peace of Riga
The Russian Civil War gave Poland the chance to regain the land that had been controlled by the Polish-Lithuanian Commonwealth but was taken by Russia in the 18th century. Meanwhile, the Soviet leaders wanted to attack Poland to respond to the leader of Poland, Józef Piłsudski, who had moved into Ukraine. The Soviets saw Poland as a land bridge to Western Europe, which they could cross to expand communism to the West. That started the Polish-Soviet War. A grear victory for Poland happened at the Battle of Warsaw. Both sides were now tired and wanted to end the war. Other victories by Poland placed it under pressure by the League of Nations, which also wanted to end the war after it had taken a lot of land.