During conflict, punishment for violating the laws of war may consist of a specific, deliberate and limited violation of the laws of war in reprisal.

Soldiers who break specific provisions of the laws of war lose the protections and status afforded as prisoners of war but only after facing a "competent tribunal" (GC III Art 5). At that point they become an unlawful combatant but they must still be "treated with humanity and, in case of trial, shall not be deprived of the rights of fair and regular trial", because they are still covered by GC IV Art 5.

Spies and terrorists are only protected by the laws of war if the power which holds them is in a state of armed conflict or war and until they are found to be an unlawful combatant. Depending on the circumstances, they may be subject to civilian law or military tribunal for their acts and in practice have been subjected to torture and/or execution. The laws of war neither approve nor condemn such acts, which fall outside their scope.Spies may only be punished following a trial and if captured after rejoining their army must be treated as a prisoner of war.^[23] Suspected terrorists who are captured during an armed conflict, without having participated in the hostilities, may be detained only in accordance with the GC IV and are entitled to a regular trial.^[24] Countries that have signed the UN Convention Against Torture have committed themselves not to use torture on anyone for any reason.

After a conflict has ended, persons who have committed any breach of the laws of war, and especially atrocities, may be held individually accountable for war crimes through process of law