The 15th Army was activated in occupied France on 15 January 1941 with General Curt Haase in command. It was tasked with occupation and defensive duties in the Pas de Calais area.
The Allies landed further west, in Operation Overlord, during June 1944. Afterwards, the 15th Army was withdrawn to the Netherlands, where it fought the Allies during Operation Market Garden in September 1944.
During October 1944 the 15th Army continued to resist against the Canadian First Army and British Second Army as they pushed west from the Nijmegen/Eindhoven salient in Operation Pheasant.
Tessin, Georg (1970). "Die Landstreifkräfte 15–30" [Ground forces 15 to 30]. Verbände und Truppen der deutschen Wehrmacht und Waffen-SS 1939-1945 (in German). Vol. 4. Osnabrück: Biblio.