In 1919 – 1921, a war between two young states broke out on the former western outskirts of the Russian Empire. On the one hand, the Russian Soviet Federative Socialist Republic had huge human resources. On the other hand, the Entente powers were investing money, weapons, and military specialists into the Republic of Poland.
As it usually happens when arguments between neighbors or relatives occur, the war was devastating. In fact, parties to the conflict were not able to fully reach their goals until the tomahawk was laid aside. Soviet Russia was exhausted by foreign intervention and the struggle with Denikin and Wrangel and did not manage to crush the enemy even when its capital was so close. Poles fought to the bitter end. After the conclusion of peace, the conflict turned to be postponed until the next big war.
Nowadays, the last but not the least witnesses of the Polish-Soviet War are propaganda posters issued by both sides.