A war grave is a burial place for members of the armed forces or civilians who died during military campaigns or operations. The term does not only apply to graves: ships sunk during wartime are often considered to be war graves, as are military aircraft that crash into water; this is particularly true if crewmen perished inside the vehicle. Classification of a war grave is not limited to the occupier's death in combat, but includes soldiers who die while in active service: for example, during the Crimean War, more soldiers died of disease than as a result of enemy action.