The 200th Military Police Command is the senior law enforcement unit within the U.S. Army Reserve. The subordinate elements of the 200th MP Command are primarily military police units, but the command also includes criminal investigation detachments, chaplains, historians, and public affairs detachments. Units are dispersed across the continental United States with major subordinate units located in California, Michigan, New York, Tennessee, and Indiana. The formation of this command is a departure from the legacy structure of a strategic force in the Army Reserve with assigned chains of command based mostly on geography. The purpose of this command is to train, command, and deploy units primarily by their functional capabilities.