It's not that hard of a concept.
There ARE some soldiers who are truly gung-ho to go to war. I think they're stupid, naïve, or maybe even sadistic to feel that way, but I'm well aware that some young men feel that way. They always have, mostly because they don't understand the reality that the enemy may be able to give as well as he gets.
If all that matters to our boys is going to war, then by all means: Elect Hillary or Trump - because, come Hell or High Water, those two are going to start wars. There's just too much money on the line to pass it up.
But if it matters to our soldiers that their President actually cares about their lives and won't casually take them, then Sanders is probably the better choice.
On that issue, I mean. I can't say enough about the reasons to NOT vote for Sanders, but they're out of scope for this thread.