This article details the order of battle of German military units during the invasion of Poland in 1939. The German army's forces for the invasion of Poland (codename Fall Weiss, English - "Case White") were divided into Army Group North (consisting of the German 3rd and 4th armies) and Army Group South (consisting of the German 8th, 10th, and 14th armies, and the Slovak Army Group Bernolak). Army Group C was on the western border of Germany defending against a potential French attack. This order of battle is for 04:47 on September 1, after which things started to get shuffled. Oberkommando des Heeres Oberkommando des Heeres was the High Command of the Heer. It controlled everything related to the Heer: Personnel, Training, Recruitment, Armaments, Transportation, Supplies, Medical Services, etc. An ongoing problem was that each service branch was its own "kingdom" resulting in massive inefficiency. Oberbefehlshaber des Heeres - Generaloberst Walter von Brauchitsch Chef des Generalstab des Heeres - General der Artillerie Franz Halder, the Chief of the General Staff of the Army was the head of all of the departments of the Heer except for the armaments section and the replacement army. Chef der Heeresrüstung und Befehlshaber des Ersatzheeres ("Chief of Armaments and Commander of the Replacement Army")- General der Artillerie Friedrich "Fritz" Fromm, who controlled all army procurement and production, and all of the troops within Germany who were replacements for front line units. Heeresgruppe Nord Heeresgruppe Nord was commanded by Generaloberst Fedor von Bock. Its initial objectives were to capture the "Polish corridor" (4th Army) and drive southwards towards Warsaw from East Prussia (3rd Army). Army Group Reserve Troops Directly subordinated to Heeresgruppe Nord were: 10. Panzer-Division - Generalleutnant Ferdinand Schaal, Commanding: Panzer-Regiment 8, Infanterie-Regiment (mot.) 86, II./ Artillerie-Regiment (mot.) 29, I./ Aufklärungs-Regiment 8. 73. Infanterie-Division - Generalleutnant Dr.phil.h.c. Friedrich von Rabenau, Commanding: Infanterie-Regiment 170, 186, 213, Artillerie-Regiment 173. 206. Infanterie-Division - Generalmajor Hugo Höfl, Commanding: Infanterie-Regiment 301, 312, 413, Artillerie-Regiment 206. 208. Infanterie-Division - Generalmajor Moritz Andreas, Commanding: Infanterie-Regiment 309, 337, 338, Artillerie-Regiment 208. 3. Armee 3. Armee was commanded by General der Artillerie Georg von Küchler. It was based in East Prussia. 3rd Army Reserves 217. Infanterie-Division - Generalmajorl Richard Baltzer, Commanding: Infanterie-Regiment 311, 346, 389, Artillerie-Regiment 217. 1. Kavallerie-Division - Oberst Kurt Feldt, Commanding: Reiter-Regiment 1, 2, Radfahr-Abteilung 1, reitende Artillerie-Abteilung 1. I. Armeekorps - Commanded by Generalleutnant Walter Petzel m.F.b. 11. Infanterie-Division -