In September 1940, World War II was a year old. The US was still a noncombatant, but it was preparing for a fight.
That month, the US introduced the Selective Training and Service Act — the first peacetime draft in US history. Mobilizing the millions of troops was a monumental task and essential to deploying "the arsenal of democracy" that President Franklin D. Roosevelt called on Americans to provide.
Inducting millions of civilians and turning them into effective troops — and keeping them happy, healthy, supplied, and fighting — was also a daunting challenge.