 Since September 1911 Böhler worked as a physician on a ship for a few months, until he started to work at the garrison's hospital at Ragusa, where he became a k. u. k. substitute medical assistant.There he mostly did bacteriological work.In Autumn 1912 he became an assistant doctor at the hospital in Brixen and in April 1913 he became assistant doctor in Tetschen an der Elbe.