True thing. Unfortunally it stay cool to be one of this trooper no matter what ther politicans who want them, or a few of them, to comit crimes. So a society can attack politicans(what doesn´t change anything) or want ther troops, who are also citizens of the country, to refuse or fight these crimes. But these things are illegal in most command structures, so ther is just the path to pull the troops in  responsibility. It may sound rhetorically but ...you would say a member of the Mafia is a criminal, no matter what or if he did something illegal yet. Wouldn´t you?
I see war as a thing you can´t deny or refuse through will. It would be nice without it, but it would also be nice without the 95% of mankind who make it a need. You have to stay ready for defense as a nation, and possibly you can mind about a smart help for other countrys(and fuck ther ressources as well as the political evolution there in 80% of all cases ...counter is rising). But you have to make your troops responsible for ther actions, no matter who have command it. If the soldier have the chance to refuse a crime, a lot wouldn´t follow this criminal orders, and the rest can´t be protectet by criminal politicans or patriotic slogans. 
I want a stamp that tell all this in way shorter words......