sentences:  Returning from Berlin to Duisburg in 1925, he worked towards a substantial increase in the size of the city in the territorial restructuring of the Ruhr, but achieved only the merger with Hamborn in 1929 (only in 1975 did Duisburg grow to the size he had envisaged).When the Great Depression hit the city, relying mostly on heavy industry (coal and steel), was severely affected and Jarres could do little to prevent unemployment from rising.Reelected in 1930, Jarres was deposed as mayor by the Nazis in May 1933 and in November retired from public life ("im Ruhestand").