Same ratio for the free and loyal border states from the 1860 US census (population 22,080,240) gives 613,340, which is almost 100,000 than the 1861 enlistment totals (527,804 army - the navy, of course, totalled 101,000, but that was for the entirety of 1861-65), but pretty far off the wartime total of some 2,778,304 enlistments.
http://ebooks.library.cornell.edu/c...2;node=waro0122:3;size=l;frm=frameset;seq=787
That's page 787, which gives 527,804 in service on Dec. 31, 1861.
Interestingly enough, the 2,507,607 population that StatsCanada gives Upper/Lower Canada in 1860 is less than the populations of Ohio (2,339,502) and Minnesota (172,014), or 2,511,516, combined. Historically, Ohio is credited with 313,180 enlistments, and Minnesota with 24,020, a total of 337,200 over the course of the war - some 48 months, or (averaged out) some 7,025 per month.
The point being in all this that however one totals it up, given the presumably similar demographics in Upper/Lower/Province of Canada, the states of Ohio and Minnesota
alone can match the military manpower that can be mobilized out of the Province, and - given the Americans began to mobilize in April, 1861, and no credible "
Trent War" scenario can begin the same in BNA before December, 1861/January, 1862 - the US has at least an eight month lead, if not longer...
So on day one of the BNA mobilization, Ohio (alone) already had (or was raising) six regiments, one battalion, and two troops of cavalry; three companies of sharpshooters; 78 regiments of infantry; and 28 batteries of artillery, all for extended service (~36 months) and with cadre from the prewar militia, veterans, the regulars, and the 22 3-months regiments raised in the spring of 1861. Minnesota adds five regiments of infantry, two companies of sharpshooters, and two batteries.
So a total of 83 regiments of infantry, six of cavalry, about a regiments' worth of separate companies and troops, and 30 batteries of artillery; something like the equivalent of seven divisions of infantry and two brigades of cavalry, at full TO&E.
Pretty impressive - except for the fact that's just
two US states.
New York (3.88 million) had a larger population than the entirely of BNA, and Pennsylvania (2.9 million) had more than the Province of Canada (Upper and Lower); Illinois (1.71 million), Indiana (1.35 million), Kentucky (1.15 million), Massachusetts (1.23 million), and Missouri (1.18 million) all had more than a million people ... and it just goes on from there.
http://www.civil-war.net/pages/1860_census.html