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 Raszyn (1809)
After the Austrian army withdrew to the other side of the swamps, prince Józef Poniatowski ordered his forces to withdraw towards Warsaw. However, since the city fortifications were in a very bad shape and the Saxon expeditionary force withdrew towards their homeland, Poniatowski decided to leave Warsaw undefended and withdraw to several fortresses located nearby (most notably to Modlin Fortress and Serock). The capital was seized with little opposition, but it was a Pyrrhic victory since the Austrian commander diverted most of his forces there at the expense of other fronts. In the following weeks Greater Poland was defended by the Corps of General Henryk Dąbrowski and the Polish cavalry seized Lwów. Finally, Poniatowski left only a small force near Warsaw to prevent the Austrians from leaving it and moved the rest of his forces southwards, which led to capturing the city of Kraków.