Søren Kam volunteered for the Waffen-SS in June 1940 and served with SS Division Wiking, like the other Danes who joined early in the war. Kam remained in Wiking for the rest of his service, while most Danes served in Free Corps Denmark and later SS Panzergrenadier Regiment 24 "Danmark" of SS Division Nordland. As such, it seems like Kam mostly served with Germans, and he commonly describes conversations he had during the war in German. On 30th January 1943, Kam became an Untersturmführer (Lieutenant) in the Waffen-SS.