This article discusses the Polish order of battle during the invasion of Poland. In the late 1930s 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 thirty infantry divisions, nine reserve divisions, eleven cavalry brigades, two motorized brigades, three mountain brigades and a number of smaller units. Most Polish forces were grouped into six armies and a number of corps-sized "Operational Groups". Later in the course of the war other operational units were created. Armies Karpaty Army 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. 2nd Mountain Brigade (2 Brygada Górska), made of National Defence units from Limanowa, Gorlice and Nowy Sącz, as well as Border Defence Corps units from Volhynia, 3rd Mountain Brigade (3 Brygada Górska), made of National Defence units from Krosno, Sanok, Przemyśl and Rzeszów Carpathian Half-Brigade of National Defence (Karpacka Półbrygada ON) 1st Motorized Artillery Regiment 9th Heavy Artillery Regiment Additionally, mobilisation plans called for creation of the Tarnów Group consisting of: 22nd Mountain Infantry Division from Przemyśl, 38th Infantry Division (reserve), created in August 1939 out of Border Defence Corps units from Polesie Voivodeship and Volhynian Voivodeship. Kraków Army 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. Lublin Army An improvised army created on September 4 from a motorized brigade and various smaller units concentrated around Lublin, Sandomierz and upper Vistula. Commanded by mj. gen. Tadeusz Piskor. Warsaw Armoured Motorized Brigade (Warszawska Brygada Pancerno-Motorowa) Smaller units Łódź Army Created on March 23, 1939, under gen. Juliusz Rómmel. Armia Łódź was to become a