It's also quite unlikely to actually end up in a position where you do kill someone, I'd imagine, even though you must be willing and able to do it if it comes to that.
To disclose, it's spoken from assumption and not experience. I never got a foot in, myself. I was in one of the last batches before conscription in my country was abolished, and they didn't bother with anyone but the best of the best. I later applied for a sort of volunteer basic training run by the homeguards, but didn't get in that, either. I'm toying with the idea of trying out the voluntary defences and the CD, but I'm not sure, it'd be quite mortifying to hear someone go "Oh, not you again, go away." I've never been really interested in army work (and I'm not the man for that job, it seems), but I'd like to be able do my tiny little bit for the country. Like guarding the field kitchen or help find people who've gone lost in the woods. I'm not that hideously inept, I hope.
A proper career, in the US Army, is an entirely different thing, of course, and I'd imagine it'd be best to stay out of it unless you're not quite determined to do it.
To meander back to the thread topic: Harambe, or Hamabre or whatever it was. Oh, how people do harp on about that silly ape. Lord knows what level of irony we've reached, but you'd still think he was running for president or something by how long he's been around in the ether. It was a dreadful misfortune for everyone, that whole business (mostly for the ape himself), but it's just gone silly, even if I suspect all the references now are intended ironically.
My contribution to this thread thus far seems to mainly be "Confused Man Yells at Internet".