The main problem I would have with an EU wide centrally controlled army is that armies tend to have better recruitment among certain demographics, and those demographics vary by region. Somewhere is going to bleed more just because it's people view military service as more desirable than somewhere else does and that's going to lead to resentment down the line.
Would it be better or worse than any particular national army in Europe currently?
The main problem I would have with an EU wide centrally controlled army is that armies tend to have better recruitment among certain demographics, and those demographics vary by region. Somewhere is going to bleed more just because it's people view military service as more desirable than somewhere else does and that's going to lead to resentment down the line.
Is there such resentment in the US among the states?
In the context of poor people getting drafted more than rich people, there can be, but in the context of people from x state not bleeding as much as y state, not that I know of. Sure, there can be a higher concentration from more populous states, but it's pretty evenly spread out.
I don't know if any such resentment ever existed after the Revolutionary War (there were certainly some tensions between colonies in the early days).
There is some, actually - the poorer and rural states source more military personnel, and there's all the tension you'd expect regarding that.
Yeah theres that, but I imagine every country on Earth has similar tensions, so, an EU army would still be dealing with things that militaries have always dealt with.
So, unless the demographics Grim Portent is talking aren't rural and/or poor people, I'm not sure an EU wide army would have a problem with it if the recruitment is done relatively evenly among it's members. There would of course, be disparities between countries with small populations vs large populations, so, some disparity would be unavoidable.
There is some, actually - the poorer and rural states source more military personnel, and there's all the tension you'd expect regarding that.
I don't know what I should expect, though. What form do these tensions take? Culturally, politically, economically? Some other -ly?
It's more along political lines I think, but if you want real tension, you'd have to look back to Vietnam. Since it's a volunteer military, not draft, I'm not really aware of any tensions.