The Malmedy massacre was a German war crime committed by soldiers of the Waffen-SS on 17 December 1944 at the Baugnez crossroads near the city of Malmedy, Belgium, during the Battle of the Bulge. Soldiers of Kampfgruppe Peiper summarily killed eighty-four U.S. Army prisoners of war (POWs) who had surrendered after a brief battle. The Waffen-SS soldiers had grouped the U.S. POWs in a farmer's field, where they used machine guns to shoot and kill the grouped POWs; many of the prisoners of war who survived the gunfire of the massacre were killed with a coup de grâce gunshot to the head. A few survived.

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.