of the gross domestic product of Belgium and the Netherlands. The average class size increased from 37 in 1927 to 43 in 1938 due to the resulting teacher shortage. Pro-Nazi Ludwig Müller was installed as Reich Bishop and the pro-Nazi pressure group German Christians gained control of the new church. Sub-chambers were set up to control aspects of cultural life such as film, radio, newspapers, fine arts, music, theatre and literature. Under the Gleichschaltung process, Hitler attempted to create a unified Protestant Reich Church from Germany's 28 existing Protestant state churches, with the ultimate goal of eradication of the churches in Germany. German soldiers march near the Arc de Triomphe in Paris, The Nazis seized from the French thousands of locomotives and rolling stock, stockpiles of weapons, and raw materials such as copper, tin, oil, and nickel.