[quote=@Milkman]
I think the Commonwealth population is very large but not excessively large. More like the upper limit It is more the mention that other great powers are short on population which is simply not true for its time period.[/quote]

Great Powers being short on population is not an issue. Being a Great Power in [i]The Age of Nations[/i] is more about prestige than population.

[quote]I personally think that the Commonwealths army is too large for the time period. There is simply not a single point in 19th century history where any of the worlds great powers managed to field an army of over 1 million men during times of war. Not to mention that very large numbers of soldiers in the field proved to be unsustainable from both a financial as a supply point of view. The most important causes of death in war during the 19th century where starvation and desease, not actual combat. Also most great European powers struggled with the financial burdons of large standing armies.[/quote]

Again. The 19th century is merely a reference point. There also weren't any Great Powers with a population of 72,000,000 either. Please remember in 1863, the Confederate States of America had a population of 9,000,000 and mobilized over a million men to fight for them. Though here is my [b]mistake[/b]. That number is supposed to represent available men, not active soldiers in uniform.

[quote]I personally think that a high amount of points in Martial prowes should account more towards actual combat performance, leadership and quality of equipment rather then size.
[/quote]

It accounts for size, fighting proficiency and command.

And I will admit here that [b]Cultural Unity[/b] adds to available manpower pool. Austria (as a 19th century empire) could have supported a much larger army, but had problems conscripting soldiers because it had such a large ethnic base that recruiting Hungarians who didn't speak German would've only hurt the war effort. 

The information on which stats effect what are secret so people don't intentionally game the system. The Commonwealth has a very homogeneous society in that his cultural unity is so high that all the subject within the nation consider themselves a Boletarian first, and are much more likely to fight for the country.