Protocol I to the Geneva Conventions, Article 52, provides for the general protection of civilian objects, hindering attacks to military objectives. Article 52 states, "In so far as objects are concerned, military objectives are limited to those objects which by their nature, location, purpose or use make an effective contribution to military action and whose total or partial destruction, capture or neutralization, in the circumstances ruling at the time, offers a definite military advantage.

Roads, water, electricity, etc could all be used by the military, so that makes them legitimate military targets. Those kids? They possibly could have grown up to fight against our troops so it’s actually okay we blew up that school.