Country % of Total War making Potential United States 41.7% Germany 14.4% USSR 14.0% UK 10.2% France 4.2% Japan 3.5% Italy 2.5% Seven Powers (total) (90.5%)
Even in the midst of economic doldrums, wartime USA still had:
- Nearly twice the population of Japan
- Seventeen time’s Japan’s national income
- Five times more steel production
- Seven times more coal production
- Eighty times the automobile production.
Source: Grim Economic Realities