Answer:
The office of war mobilization was created by Franklin D Roosevelt in May 1943. It replaced the war production board which was not efficient to coordinate the US mobilization efforts during the second world war. The main purpose was to maximize resources and increase industrial production for war. In 1944 60 percent munition for allied ammunition and 40 percent of world Arms was being produced by the USA. In 1944 it was changed to the Office of War Mobilization and re conversion, now its main purpose was to change the US economy as per the need of peaceful times.