But, how well would that work against the "illegal" invaders of history other than USA and other western cultures that at least give lip service to the value of human life. If the shoe were on the other foot Saddam or the Palestinians wouldn't bother complaining that we had broken the rules. They would just blow the hell out of all hospitals and ambulances.

"Illegal", what's all that about? How many invaded countries ponder the legality of the invasion and make decisions regarding the "rules" based on the legality of the invasion.

The winner will sort out the "rules" and the punishment for breaking them.