 Complete the following phrase:  Hamann was of Baltic German parentage. Trained as a chemist, he had difficulties finding a job due to the Great Depression. He joined the SA in August 1931, the Nazi Party in December 1932, and the SS in July 1938. He served in the Luftwaffe during the invasion of Poland and Battle of France as a paratrooper Fallschirmjäger. He returned to Berlin where he joined the SS and completed training courses. In March 1941, he was promoted to SS-Obersturmführer first lieutet. After the 