 From 1940 onwards, Vögler was heavily involved with the manufacture of munitions.He served in increasingly important positions under Albert Speer in the Ruhr industrial heartland from 1942 until 1944.He helped rationalize armament production and indeed increase production at a time when Germany was clearly losing the war, following the loss of an army at Stalingrad, defeat at the Battle of El Alamein and at the Battle of Kursk.