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. Not all military police organizations are concerned with all of these areas, however. These personnel are generally not front-line combatants but, especially when directing military convoys, will be at or close to the front line.