 As with all official terms, some countries have specific official terminology which differs from the exact linguistic meaning.The head of the military police is commonly referred to as the provost marshal, an ancient title originally given to an officer whose duty was to ensure that an army did no harm to the citizenry.Military police are concerned with law enforcement (including criminal investigation) on military property and concerning military personnel, installation security, close personal protection of senior military officers, management of prisoners of war, management of military prisons, traffic control, route signing and resupply route management.