[Mobhack]

You set up a campaign with opponents that weren't historically active for date. therefore anything can happen.

It's not something tested for, and of no use for debugging.

If you want to set up generated campaigns, ensure the opponents are in date for that historic time frame (The USA was not, so the date checking that automatically adjusts the campaign clock for the allies in "gap periods" wont work as the USA is not an Allied force then).