四カ年計画
By 1939, three years into the Four Year Plan, over 20% of all German industrial workers worked for the armed forces, while nearly 33% of those in the manufacturing and building sectors worked there. By comparison, in 1938, Britain and the United States produced just 13% of the quantity of weapons that Germany produced that year. German armament spending went from under 2% of gross national product in 1933 to over 23% in 1939. German armament expenses under the Nazi regime increased rapidly, especially under the Four Year plan: