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 Radzymin (1809)
Following the Battle of Raszyn on April 19, the Polish forces commanded by Prince Józef Poniatowski left Warsaw undefended and withdrew to several fortresses located nearby (most notably to Modlin Fortress and Serock). The Austrians seized the Polish capital relatively easy, but it was a pyrrhic victory, as the Austrian force was now seriously overstretched and had a still unbeaten enemy in the vicinity of Warsaw, as well as new Polish forces gathering strength behind their lines in Greater Poland. Prince Este garrisoned Warsaw with 10,000 soldiers, and split his remaining forces, sending some 6,000 troops under Gen. Johann Friedrich von Mohr to the right bank of the Vistula, and the rest towards Toruń and other targets on the left bank.