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 Warsaw (1831)
The assault started on 6 September 1831. Russian forces surprised the Poles by attacking the strongest Polish position in the suburb of Wola. Despite staunch defence of some of the ramparts, especially Fort 54 and Fort 56, after the first day the outer line of Polish defences had been breached by Russian infantry and artillery. The following day fights resumed, but this time Russian artillery was close enough to shell the western boroughs of the city itself. Although losses were similar on both sides, Polish authorities decided not to risk another Massacre of Praga and ordered the evacuation of the city. On 8 September 1831 Warsaw lay in Russian hands, and the remainder of the Polish Army retreated to Modlin. The November Uprising ended soon afterwards, with the remnants of the Polish Army crossing the borders of Prussia and Austria, to avoid being captured by the Russians.