Earlier quoted context omitted.
And that's why there are things called ROEs: Rules of Engagement. A soldier just can't shoot anyone they see. There are very hard limits on who is considered a "combatant" and who is not. A big part of what gets soldiers and Marines on our side killed is ambiguity about who can be shot when they present a threat and who cannot. If you do anything outside of the ROE it can be considered a war crime: http://www.dailyma…
http://en.wikipedia.org/wiki/United_States_war_crimes Have a read. How many soldiers ended up in jail for these? How many commanding officers?
The prosecution urged that Medina knew, or should have known, of the massacre, but, in addition to inciting it, he took no action either to stop it or to subsequently bring to justice those who committed crimes. “Even if he did not personally commit any crimes in My Lai, Medina clearly failed to maintain control over men under his command who were committing scores of them.”42 Despite apparently meeting the von Leeb–List standard – knew or should have known – and, for that matter, the Yamashita standard – must have known – Medina was acquitted.43 One civilian nonlawyer who viewed the trial found the case poorly prosecuted.44 Another calls it “a striking example of the extent to which a domestic . . . tribunal will devise a restricted formulation of the superior responsibility doctrine in order to avoid the prosecution of its own nationals.”45 But that ascribes a sinister motive to the court-martial that did not exist. (p.422)
http://www.amazon.com/The-Law-Armed-Conflict-International/d...
I hope this information is helpful.