The German operation for the invasion of Denmark and Norway in April 1940 was code-named Weserübung, or "Weser Exercise." Opposing the invasion were the partially mobilized Norwegian military, and an allied expeditionary force composed of British, French, and Free Polish formations. The following list formed the order of battle for this campaign. Germany XXI Gruppe On 1 March 1940, the German 21st Army Corps was renamed Group XXI and placed in charge of the invasion of Norway. The group was allotted two Mountain and five Infantry divisions for this task. It was led by the commanding officer of the XXI Korps, General der Infanterie Nikolaus von Falkenhorst. His Chief of Staff was Oberst Erich Buschenhagen. 2nd Mountain Division Commanded by Generalleutnant Valentin Feurstein The division fought in the northern part of Norway, the 137th Regiment dropped by parachute at Narvik on 15 May. Regiments: 136th & 137th mountain light infantry; 111th mountain artillery 3rd Mountain Division Commanded by Generalleutnant Eduard Dietl Most of this division was landed at Trondheim and Narvik on 9 April. Regiments: 138th & 139th mountain light infantry; 112th mountain artillery 69th Infantry Division Commanded by Generalmajor Hermann Tittel From 9 April through 15 April, divisional elements were transported to Bergen, Stavanger, and Oslo. Regiments: 159th, 193rd, and 236th infantry; 169th artillery 163rd Infantry Division Commanded by Generalmajor Erwin Engelbrecht Elements were landed at Oslo, Kristiansand, Arendal, and Stavanger, beginning on 9 April. Regiments: 307th, 310th, and 324th infantry; 234th artillery 181st Infantry Division Commanded by Generalmajor Kurt Woytasch By 15 April, this division had arrived at Trondheim, being primarily transported by aircraft. Regiments: 334th, 349th, and 359th infantry; 222nd artillery 196th Infantry Division Commanded by Generalmajor Richard Pellengahr By 15 April, most of this division had landed at Oslo. Regiments: 340th, 345th, and 362nd infantry; 233rd artillery 214th Infantry Division Commanded by Generalmajor Max Horn. It landed at Kristiansand and Arendal on 17 and 18 April. Regiments: 355th, 367th, and 388th infantry; 214th artillery 170th Infantry Division Commanded by Generalmajor Walter Wittke Entered Denmark through the southern end of Jutland peninsula on 9 April. Regiments: 391st, 399th, and 401st infantry; 240th artillery 198th Infantry Division Commanded by Generalmajor Otto Röttig Occupied Copenhagen, Zealand, and the southern Danish islands on 9 April. Regiments: 305th, 308th, and 326th infantry; 235th artillery German 11th Motorized Rifle Brigade Commanded by Oberst Günther Angern Part of the Denmark invasion force. It