 Complete the following phrase:  After the end of World War I, which he experienced between 1914 and 1917 as a lieutet, awarded the Iron Cross First Class EK I, first on the Eastern Front, and later until his captivity in April 1917 in France, Osthold began studying political science in Königsberg in 1921. Before he received his doctorate in political science in 1926 in Münster with a thesis on the relationship between Marxist socialism and German state thought in World War I, Osthold had been heavily involved in the German national movement in addition to his professional activity. As a member of the Stahlhelm, which was known to be closely related to the DNVP, he had inter alia participated in the 