Military police (MP) are law enforcement agencies connected with, or part of, the military of a state.
The word can have different meanings in different countries, and may refer to:
The status of military police is usually prominently displayed on the helmet and/or on an armband, brassard, or arm or shoulder flash. In the Second World War, the military police of the German Army still used a metal gorget as an emblem.
Naval police members are sometimes called "masters-at-arms" and shore patrol.
"Military police" in Brazil has two meanings. There are provost corps for each of the Brazilian Armed Forces: Army Police (Portuguese: Polícia do Exército, PE) for the Army, Navy Police (Portuguese: Polícia da Marinha) for the Navy, and Air Force Police (Portuguese: Polícia da Aeronáutica, PA) for the Air Force.
The second type are the civilian preventative police, with military organization comparable to gendarmerie, called the Military Police (Portuguese: Polícia Militar). Each State has their own Military Police.
There is also a joint National Public Security Force (Portuguese: Força Nacional de Segurança Pública), created in 1999. This force is composed of the most qualified State Military Police personnel from all the states, only to be used when the governor of a state asks for help to control a significant security crisis.