Modlin Fortress was initially the headquarters of the Modlin Army until its retreat eastwards. From September 13 to September 29 in 1939 it served as a defensive citadel for Polish forces under the command of General Wiktor Thommée against assaulting German units. This fighting was closely linked with the strategic situation of the Battle of Warsaw.
Polish forces: 40,000 men, 96 guns, 7 TK-3 tankettes, armoured train "Śmierć".
German forces: 4 infantry divisions, 2nd Light Division, Panzer Division Kempf, 100 aircraf.
Polish casualties and losses: 1,300 KIA, 4,000 WIA, 35,000 captured.
