it would be these worthless of American society that would stand in long blue ranks as lines of Confederate soldiers marched past to stacked arms, remove cartridge boxes/waist belts, and furl regimental standards to lay over the rifle stacks, then march of to sign their paroles.
What most folks don’t realize is that beyond the “nostalgia” of the CW, Americans (Union) for the most part, thought it was a disgrace to go and serve in the Army - much less make it a career choice. Which is why you had high levels of immigrants and foreigners serve among the Union ranks - especially post 1863.
Sure you had a good share of elitists serving, who were either self-promoting martinets (Chamberlain, Barlow) or bored volunteers looking for adventure (Miles, Wallace).
Manpower does win wars, regardless of where they come from.