The usual number for total Union Army is around 2.1 million men.
Of those, roughly 25% were foreign born =~525,000.
Foreign born troops came primarily from Germany, Ireland & Britain.
Another 200,000 were Union colored troops = about 200 regiments.
Around 150,000 Union troops were conscripts.
The usual number for total Confederate Army is around 1.0 million men.
Of those no more than 5% were foreign born = ~50,000.
There were no Confederate colored regiments, but the numbers of slaves serving Confederate armies in non-combat roles could easily match the 200,000 Union colored troops.
Around 120,000 Confederate troops were conscripts.
I have never seen you opine on Nathan Bedford Forest's Black Cavalry men.
Black Confederate soldiers on horseback would seemingly be an interesting story from the perspective of Civil War history buffs.
Kinda like the Hessians.
Does anyone see anything wrong with using foreign troops to subjugate Americans?