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