Ukraine

Keep in mind that there's a so-called tooth to trail ratio. Typically you'd have (much) less than 30% of military personnel that's actually meant to engage in combat.

So out of that 1.1M, there's going to be less than 400k people directly in combat situations. The rest is logistics. And 30% is a very large portion that would likely have less effective combat force. (Perhaps in line with what can be seen of russian army in Ukraine)