Allgemeine SS
In 1940 he was admitted into the Allgemeine SS with rank as an "SS Hauptsturmführer". In December that year he volunteered to leave the office and served in the 1st SS Division Leibstandarte SS Adolf Hitler, seeing action in Bulgaria, Greece, Romania and Yugoslavia. In July 1941 Rauch returned to work under "SS Obergruppenführer" Dr. Hans Lammers in Berlin.