The Massacre of Kos () was a war crime perpetrated in early October 1943 by the Wehrmacht against Italian army PoWs on the Dodecanese island of Kos, then under Italian occupation. About a hundred Italian officers were shot on the commands of General Friedrich-Wilhelm Müller, after being considered traitors for resisting the German invasion of the island (known as the Battle of Kos, part of the Dodecanese campaign).