You clearly know little history.  World war two was extremely ambiguous.  Germans who were attempting to overthrow hitler met the same international response as the generals who wanted to overthrow Hussein.  I know numerous veterans, even when the cause is just (and soldiers are always told it is so) the actions aren't  necessarily (or usually).   Almost any veteran will tell you that, usually after a few drinks.  Even in ww2 british officers stood at the back to shoot deserters. 

     If you think there is nothing 'morally ambiguous' about atomic bombing civilian populations and murdering millons of them, you need to take a course in ethics.