The Waffen-SS was the combat branch of the Nazi Party's paramilitary Schutzstaffel (SS) organisation. Its formations included men from Nazi Germany, along with volunteers and conscripts from both German-occupied Europe and unoccupied lands. With the start of World War II, tactical control was exercised by the Oberkommando der Wehrmacht, with some units being subordinated to the Kommandostab Reichsführer-SS directly under Reichsführer-SS Heinrich Himmler's control. It was disbanded in May 1945.