bolt between Armies "Kraków" and "Poznań". However, because of mistakes committed by Gen. Rómmel, the army was located too close to the German border and joined fighting from the very beginning of the campaign, which deprived it of any possibilities of cooperation with the surrounding units. It consisted of 4 infantry divisions and 2 cavalry brigades. 2nd Legions Infantry Division (2 Dywizja Piechoty Legionów) from Kielce, 10th Infantry Division (10 Dywizja Piechoty) from Łódź, 28th Infantry Division (28 Dywizja Piechoty) from Łomża, 30th Infantry Division (30 Dywizja Piechoty, reserve division) from Kobryn, Kresowa Cavalry Brigade (Kresowa Brygada Kawalerii) from Brody, Wołyńska Cavalry Brigade (Wołyńska Brygada Kawalerii) from Rowne, Sieradz National Defence Brigade (Sieradzka Brygada Obrony Narodowej) Modlin Army Created on March 23, 1939, for defence of Warsaw from the north. The army was to defend fortified lines along the border with East Prussia near Mława, and then retreat towards Narew river. Led by brig. gen. Emil Krukowicz-Przedrzymirski. Consisted of 2 infantry divisions and 2 cavalry brigades. 8th Infantry Division (8 Dywizja Piechoty) from Modlin, 20th Infantry Division (20 Dywizja Piechoty) from Baranowicze, Nowogródzka Cavalry Brigade (Nowogródzka Brygada Kawalerii) from Baranowicze, Mazowiecka Cavalry Brigade (Mazowiecka Brygada Kawalerii) from Warsaw, Warsaw National Defence Brigade (Warszawska Brygada Obrony Narodowej) Pomorze Army The Army was created on March 23, 1939, to defend Toruń and Bydgoszcz and to carry out delaying actions in the so-called "Polish Corridor". It was led by Lt.-Gen. Władysław Bortnowski and consisted of five infantry divisions, two National Defence brigades and one cavalry brigade. Poznań Army The Armia Poznań led by mj. gen. Tadeusz Kutrzeba was to provide flanking operations in the Grand Poland and withdraw towards lines of defence along the Warta river. It consisted of 4 infantry divisions and 2 cavalry brigades. 14th Infantry Division (14 Dywizja Piechoty) from Poznań 17th Infantry Division (17 Dywizja Piechoty) from Gniezno 25th Infantry Division (25 Dywizja Piechoty) from Kalisz 26th Infantry Division (26 Dywizja Piechoty) from Skierniewice Wielkopolska Cavalry Brigade (Wielkopolska Brygada Kawalerii) from Poznań, Podolska Cavalry Brigade (Podolska Brygada Kawalerii) from Stanisławów. Prusy Army Under gen. Stefan Dąb-Biernacki. Created in the summer of 1939 as the main reserve of the Commander in Chief. According to the "Plan West" (Plan Zachód, code name for the Polish mobilization plan) it was to be composed of units mobilized as the second and third waves and its main purpose was to cooperate with the nearby