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Polish OOB during the invasion of Poland . In the late thirties Polish headquarters prepared "Plan Zachód" (Plan "West), a plan of mobilization of Polish Army in case of war with Germany. Earlier, the Poles did not regard the Germans as their main threat, priority was given to threat from the Soviets (see: Plan East).
The overall operational plan assumed the creation of 30 infantry divisions, 9 reserve divisions, 11 cavalry brigades, two motorized brigades, 3 mountain brigades and a number of smaller units. Most Polish forces were grouped into 6 armies and a number of corps-sized "Operational Groups". Later in the course of the war other operational units were created.
Created on July 11, 1939, under Major General Kazimierz Fabrycy. Armia Karpaty was created after Germany annexed Czechoslovakia and created a puppet state of Slovakia. The main aim of the army was to secure mountain passes in the Carpathians. Initially the army consisted of 2 improvised mountain brigades and a number of smaller units, but later in the course of war was joined by forces of the withdrawing Armia Kraków.
Additionally, mobilisation plans called for creation of the Tarnów Group consisting of:
Created on March 23, 1939, as the main pivot of Polish defence. Its main task was to delay advancing German troops and withdraw eastwards along the northern line of the Carpathians. It consisted of 5 infantry divisions, 1 mountain infantry division, 1 motorized cavalry brigade, 1 mountain brigade and 1 cavalry brigade under gen. Antoni Szylling.
|Kraków Army||Unit||Polish name||Commander||Remarks|
|Army units – gen. Antoni Szylling|
|6th Infantry Division from Kraków||6 Dywizja Piechoty||Bernard Mond|
|7th Infantry Division from Częstochowa||7 Dywizja Piechoty||gen. bryg. Janusz Gąsiorowski|
|11th Infantry Division from Stanisławów||11 Dywizja Piechoty||gen. bryg. Bronisław Prugar-Ketling|
|Kraków Cavalry Brigade from Kraków||Krakowska Brygada Kawalerii||gen.bryg. Zygmunt Piasecki|
|10th Motorized Cavalry Brigade from Rzeszów||10 Brygada Kawalerii Zmotoryzowanej||płk. Stanisław Maczek|
|Śląsk Operational Group – gen. Jan Jagmin-Sadowski|
|23rd Infantry Division from Katowice||23 Dywizja Piechoty||płk. Władysław Powierza||Upper Silesian|
|55th Infantry Division, reserve division made of several units from the area of Upper Silesia and Jaworzno||55 Dywizja Piechoty||płk. Stanisław Kalabiński||reserve|
|Bielsko Operational Group – gen. Mieczysław Boruta-Spiechowicz|
|21st Mountain Infantry Division from Nowy Sącz and Bielsko-Biała||21 Dywizja Piechoty Górskiej||gen. Józef Kustroń|
|1st Mountain Brigade, made of several National Defence units from Żywiec, Zakopane and Jasło.||1 Brygada Górska||płk Janusz Gaładyk||mostly elite KOP troops|
An improvised army created on September 4 from 1 motorized brigade and various smaller units concentrated around Lublin, Sandomierz and upper Vistula. Commanded by mj. gen. Tadeusz Piskor.
Created on March 23, 1939, under gen. Juliusz Rómmel. Armia Łódź was to become a 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.
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.
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.
|Pomorze Army||Unit||Polish name||Commander||Remarks|
|Army units – gen. Władysław Bortnowski|
|9th Infantry Division from Siedlce||9 Dywizja Piechoty||płk. Józef Werobej|
|15th Infantry Division from Bydgoszcz||15 Dywizja Piechoty||gen. Wacław Przyjałkowski||Greater Polish|
|27th Infantry Division from Kowel||27 Dywizja Piechoty||gen.bryg. Juliusz Drapella|
|Pomeranian National Defence Brigade||Pomorska Brygada Obrony Narodowej|
|Chełmno National Defence Brigade||Chełmska Brygada Obrony Narodowej|
|Operational Group "East" – gen. Mikołaj Bołtuć|
|4th Infantry Division from Toruń||4 Dywizja Piechoty||płk. Rawicz-Mysłowski, płk. Józef Werobej|
|16th Infantry Division from Grudziądz||16 Dywizja Piechoty||płk. Zygmunt Szyszko-Bohusz||Pomeranian|
|Czersk Operational Group – gen.bryg. Stanisław Grzmot-Skotnicki|
|Pomeranian Cavalry Brigade from Bydgoszcz||Pomorska Brygada Kawalerii||gen.bryg. Stanisław Grzmot-Skotnicki|
|Independent Units Chojnice and Kościerzyna||Oddziały Wydzielone "Chojnice" i "Kościerzyna"|
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.
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 armies "Poznań" and "Kraków".
Mobilized in two groups. Because of fast German advance both groups entered combat separately and most units did not reach full mobilization. It consisted of 6 infantry divisions, 1 cavalry brigade and a battalion of tanks.
|Prusy Army||Unit||Polish name||Commander||Remarks|
|Army units – gen. Stefan Dąb-Biernacki|
|39th Infantry Division, made of several regiments of the Border Defence Corps||39 Dywizja Piechoty||płk. Bruno Olbrycht||reserve|
|44th Infantry Division, made of several regiments of the Border Defence Corps||44 Dywizja Piechoty||płk. Eugeniusz Żongołłowicz||reserve|
|Northern group – gen. Stefan Dąb-Biernacki|
|13th Infantry Division from Rowne||13 Dywizja Piechoty||płk. Władysław Zubosz-Kaliński||Kresowa|
|19th Infantry Division from Wilno||19 Dywizja Piechoty||gen. Józef Kwaciszewski|
|29th Infantry Division from Grodno||29 Dywizja Piechoty||płk. Ignacy Oziewicz|
|Wileńska Cavalry Brigade from Wilno||Wileńska Brygada Kawalerii||płk. Konstanty Drucki-Lubecki|
|1st tank battalion||1 battalion czołgów|
|Southern group – gen. Stanisław Skwarczyński|
|3rd Legions Infantry Division from Zamość||3 Dywizja Piechoty Legionów||płk. Marian Turowski|
|12th Infantry Division from Tarnopol||12 Dywizja Piechoty||gen. Gustaw Paszkiewicz|
|36th Infantry Division, made from troops of Border Defence Corps of the Podole area.||36 Dywizja Piechoty||płk Michał Ostrowski||reserve|
Created on September 10, 1939, from various units in Warsaw and Modlin Fortress area. Initially it consisted of approximately 25 infantry battalions and 40 tanks. Later it was reinforced by forces of Łódź Army and elements of Modlin Army. It was commanded by col. Walerian Czuma, although the nominal commander was gen. Juliusz Rómmel.
|Warszawa Army||Unit||Polish name||Commander||Remarks|
|Modlin Fortress – gen. Wiktor Thommée|
|2nd Legions Infantry Division from Kielce||2 Dywizja Piechoty Legionów||płk Antoni Staich||elements|
|8th Infantry Division from Modlin||8 Dywizja Piechoty||płk Tadeusz Wyrwa-Furgalski||elements|
|28th Infantry Division from Warszawa||28 Dywizja Piechoty||płk Broniewski||elements|
|30th Infantry Division from Kobryn||30 Dywizja Piechoty||gen. Leopold Cehak||elements|
|Western Approach – płk Marian Porwit|
|13th Infantry Division from Rowne||13 Dywizja Piechoty||płk Władysław Zubosz-Kalinski||reinforced|
|15th Infantry Division from Bydgoszcz||15 Dywizja Piechoty||gen. Zdzisław Przyjałkowski||reinforced|
|25th Infantry Division from Kalisz||25 Dywizja Piechoty||gen. Franciszek Alter||elements|
|Combined Cavalry Brigade||Zbiorcza Brygada Kawalerii||gen. Roman Abraham||combined|
|Eastern Approach – gen. Juliusz Zulauff|
|5th Infantry Division from Lwów||5 Dywizja Piechoty||gen. Juliusz Zulauff||elements, 1 regiment|
|8th Infantry Division from Modlin||8 Dywizja Piechoty||płk Tadeusz Wyrwa-Furgalski||routed, 1 regiment under Sosabowski|
|20th Infantry Division from Baranowicze||20 Dywizja Piechoty||płk Wilhelm Liszka-Lawicz|
|44th Infantry Division||44 Dywizja Piechoty||płk Eugeniusz Żongołłowicz||reserve, routed|
|1st "Defenders of Praga" Infantry Regiment||1 pułk piechoty Obrońców Pragi||płk Stanisław Milian||improvised|
|2nd "Defenders of Praga" Infantry Regiment||2 pułk piechoty Obrońców Pragi||płk Stefan Kotowski||improvised|
Was one of the reserves of the northern front of Polish defences, created on September 1, 1939. According to Plan West, it was supposed to defend the line of the Narew river from Wehrmacht units advancing from East Prussia. Due to rapid German advance, the group withdrew towards the Bug river, and on September 11, Polish Commander in Chief Edward Rydz-Śmigły ordered General Wincenty Kowalski, commandant of Operational Group Wyszków, to merge his unit with Northern Front under General Stefan Dąb-Biernacki.
It consisted of the following units:
Consisted of 2 infantry divisions and 2 cavalry brigades:
Naval and river support