Polish-Soviet War and the 1920 Battle of Warsaw

The Polish-Soviet War (1919–1921) was a pivotal conflict that shaped the borders of the newly independent Polish state following World War I. A defining moment of this struggle was the Battle of Warsaw, fought between August 13 and 15, 1920, often referred to as the ‘Miracle on the Vistula.’ This engagement is regarded as a decisive victory that preserved Polish independence and halted the spread of Bolshevism into Europe.

The conflict involved complex geopolitical maneuvers, including an agreement between Poland and the Ukrainian People's Republic, which led to the joint entry into Kyiv in May 1920. The Soviet offensive, led by commanders such as Mikhail Tukhachevsky, aimed to capture Warsaw and support communist revolutions in Germany and former Austro-Hungarian territories. The war formally concluded with the Treaty of Riga on March 18, 1921.