A Tomb of the Unknown Soldier refers to a monument in dedication to the services of an unidentified soldier and to the common memories of all soldiers killed in any war. Such tombs can be found in many nations and are usually high-profile national monuments. Throughout history, many soldiers have died in wars without their remains being identified. Following the First World War, a movement arose to commemorate these soldiers with a single tomb, containing the body of one such unidentified soldier. In Chile and Ukraine, a second tomb was unveiled to commemorate The Unknown Sailor.