On 1 June 1934, Kumm joined the SS-Verfügungstruppe (SS Dispositional Troops) and on 1 July received his first training with the SS-Standarte "Germania" in Hamburg.

[1] Kumm commanded the Der Führer Regiment of the SS Division Das Reich from July 1941 to April 1943.

Soviet intelligence identified large German tank formations in western Hungary and developed a successful counterattack strategy.

After the failure of Operation Spring Awakening, Sepp Dietrich's 6th SS Panzer Army and the LSSAH retreated to the Vienna area.

[...] Let us be clear about it: the [Allied] battle was directed not only against the authoritarian regime of the Third Reich, but, above all, against the resurgence of the strength of the German people.At least through the 1970s, Kumm remained "the ever unreformed Nazi enthusiast" according to researcher Danny S. Parker, who was given access to the previously closed HIAG archives.