Instead of a static number and an agreed upon number, maybe you could go off the population of the countries in question… 1 million citizens = 1 infantry reserve? Â
Maybe just based off the population of the capitol nation so for the Americans that would be W. USA, C. USA and E. USA (Alaska and Hawaii not being states yet.) England would be England, Scotland and perhaps India (as a chief colony.) Maybe to be more fair to Japan you could add in those mainland Asia territories they start with as well as Japan itself. Russia could be limited (so as not to be insane) to everything from Moscow to Odessa and up to St. Petersburg and back.
Or just cheap out and look up census data for 1940?
Russia = 109.3 million
Germany = 80.6 million
England = 46.5 million (includes 500k pop. India)
France = 39.0 million
Italy = 44.5 million
Japan = 73.0 million
China = 0.8 million
Australia = 7.0 million
United States = 132.1 million
So if you went that route, China would get stiffed (so you’d have to buff them somehow, maybe exempt them?) Otherwise you’d have:
Germany - 81 reserves
Russia - 109 reserves
Japan - 73 reserves
USA - 132 reserves
England - 46 reserves
Italy - 45 reserves
ANZAC - 7 reserves
Exempt Minor Powers:
France - 39 reserves
China - 1 reserves
This gives the Allies 95 more reserves than the Axis. Not including France or China.