Battle of Warsaw (1920)
The battle of Warsaw was fought from August 12–25, 1920 as Red Army forces commanded by Mikhail Tukhachevsky approached the Polish capital of Warsaw and the nearby Modlin Fortress. On August 16, Polish forces commanded by Józef Piłsudski counterattacked from the south, disrupting the enemy's offensive, forcing the Russian forces into a disorganized withdrawal eastward and behind the Neman River. Estimated Russian losses were 10,000 killed, 500 missing, 30,000 wounded, and 66,000 taken prisoner, compared with Polish losses of some 4,500 killed, 10,000 missing, and 22,000 wounded.
Battle of Białołęka
By February 24, the Russian Army had reached the outskirts of Warsaw in two columns: one from the North under the command of General Shakhovskiy, and one from the East under the command of General Grigoriy Vladimirovich Rosen. Field Marshal von Diebitsch initially planned a full frontal assault on Warsaw to take place on February 26. The successful Polish counter-attack at Białołęka, however, prompted von Diebitsch to change his plans and attack earlier. On February 25, General Rosen received orders to attack, resulting in the Battle of Olszynka Grochowska. His forces were joined later that day by the remnants of Shakhovskiy's defeated column.