The Battle of Grodno was a WWII military engagement between the Soviet forces and the Polish Army, fought from September 20 to September 22, 1939, in Grodno, Poland (today Belorus). The result was a Russian victory as one of the last pockets of Polish ressistance was cleared. Thus, the eastern half of Poland, and Grodno included, would be incorporated into the Soviet Union.
On September 1, 1939, Germany had begun the invasion of Poland, which was characterized by a fast mobile warfare. On September 17, when the Whermacht had taken almost 50% of Polish territory, the Soviet Union attacked Poland from the East in accordance with the secret clause of the Molotov-Ribbentrop Pact. The Russians made rapid progress and with relatively ease, since most of the Polish troops were fighting the German forces. On September 20, a Red Army’s armor unit launched an assault on Grodno. Poorly armed, the Polish Army units inside the city were defeated and driven out of Grodno after two days of heavy fighting.
Opposing Forces: Red Army’s 15th Armored Corps, under General Ivan Boldyn / A Polish Army’s cavalry brigade, commanded by Waclaw Jan Przezdziecki.