The Battle of the Niemen River was the second-largest battle of the Polish–Soviet War, confirming Polish dominance after the decisive Battle of Warsaw.
Key Facts
- Duration
- 15 September – 25 September 1920
- Conflict
- Polish–Soviet War
- Scale ranking
- Second-largest battle of the Polish–Soviet War
- Key geographic feature
- Middle Neman River
- Polish advance post-battle
- Reached Tarnopol-Dubno-Minsk-Drissa line
Location
Cause → Event → Consequence
Following their near-total defeat at the Battle of Warsaw in August 1920, Soviet Red Army forces under Mikhail Tukhachevsky sought to establish a new defensive line running northward from the Polish-Lithuanian border to Polesie, anchored at Grodno, in order to halt the advancing Polish Army.
Between 15 and 25 September 1920, Polish forces under Józef Piłsudski executed a flanking maneuver near the middle Neman River, in the region between Suwałki, Grodno, and Białystok, outflanking and again defeating the Soviet forces attempting to hold their defensive line.
The Soviet defensive line was broken, and after the subsequent mid-October Battle of the Szczara River, the Polish Army advanced to the Tarnopol-Dubno-Minsk-Drissa line, effectively consolidating Poland's strategic gains in the eastern theater of the Polish–Soviet War.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Józef Piłsudski.
Side B
1 belligerent
Mikhail Tukhachevsky.