

These limits persist even though they are frequently violated, often without punishment. There have been limits on the conduct of war throughout military history.

They apply to the United States through enactments by Congress, the president, the Department of Defense, and specific commanders-as well as through the ratification of treaties including the Charter of the United Nations, and through those obligations of international custom binding according to the U.S.

The laws of war are the rules of international law that govern the conduct of war between nation-states, and are especially concerned with whether a use of force is allowed, when a state of war exists, the weapons and conduct of war, and the treatment of opponents, prisoners, neutrals, and noncombatants.
