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.
Siege of Warsaw (1939)
By then General Czuma had gathered an equivalent of 2 infantry divisions under his command. His forces were supported by 64 pieces of artillery and 33 tanks (27 of Vickers E, 7-TP and R-35 and 6 TK-3 and TKS tankettes). On September 8 the Commander-in-Chief, Marshal Edward Rydz-Śmigły ordered the creation of an improvised Warsaw Army ("Armia Warszawa") under General Juliusz Rómmel. The newly created force was composed of the forces defending Warsaw and Modlin Fortress, as well as all Polish units defending the Narew and the Vistula between Warsaw and Pilica river lines. General Czuma continued to be the commander of the Warsaw Defence Force, which he split into two sectors: East (Praga district) under Lt.Col. Julian Janowski and West under Colonel Marian Porwit.