Mobilization for War during WW2
In order to resolve the Great Depression FDR started the New Deal programs. These government funded programs served communities across the country in various ways. But more importantly they provided new jobs for the unemployed, which was an epidemic at the time, so it lessened the effects of the Great Depression.
FDR took immediate action as America entered WW2, he funded businesses so that they would stop producing domestic products and start producing war goods. After that he set high production goals this caused businesses to increase their employment numbers and compete for employees. Because so many Americans were part of these businesses, as either employers or employees, it was fair to say that the whole nation was working towards the war effort. However this was not enough so the government started war bonds, and encouraged rationing. In order to get Americans to participate Roosevelt gave speeches that inspired patriotism in the country and an understanding of people's place in the war.