A crime committed in wartime; violation of rules of war WordNet 3.0 & Open English WordNet

A war crime is a violation of the laws of war that gives rise to individual criminal responsibility for actions by combatants in action, such as intentionally killing civilians or intentionally killing prisoners of war, torture, taking hostages, unnecessarily destroying civilian property, deception by perfidy, wartime sexual violence, pillaging, and for any individual that is part of the command structure who orders any attempt to committing mass killings including genocide or ethnic cleansing, the granting of no quarter despite surrender, the conscription of children in the military and flouting the legal distinctions of proportionality and military necessity. Wikipedia

Serious violation of the laws of war. Wikipedia Disambiguation

Serious violation of the laws of war Wikidata

A punishable offense, under international law, for violations of the law of war by any person or persons, military or civilian. Wiktionary

Offense for violations of the law of war. Wiktionary (translation)