ummm - // You can't join the army and not expect conflict. //
Obviously - no point training people to kill people and then expecting them to moan when they actually have to do it - that's an understood part of signing up.
However, when it comes to being stuck in court decades after you finished your service, and prosecuted by the government of the country you signed up to defend, and got shot at doing it, I think it's reasonable for any soldier in that situation to feel singularly aggrieved and hard done to.