In 1920, Poland and the Bolsheviks fought a war. Initially, the Poles drove deep into the USSR, but the Soviets soon counterattacked and reached Warsaw and the Vistula River.

What if the Soviets were able to defeat the Polish Army and capture Warsaw (and essentially the rest of Poland)? First, would Lenin's dream of spreading the Revolution to Europe have more success? A communist revolution in Hungary had recently been defeated, and Germany was deeply unstable.

Would the Entente have intervened more significantly in the Russian Civil War, possibly by invading Poland? Would Germany have been allowed to retake the Polish Corridor to keep it out of Soviet hands? Would Romania or Czechoslovakia fight a war with the Soviets over Hungary and/or the Communist concept of a Permanent Revolution? Would a victory in Poland lead to a faster Red Army victory in the Civil War, and possibly a reconquest of Finland?