Gordon Williamson 
German Military Police Units 1939 45 [PDF ebook] 

The military policeman must be one of the least appreciated yet most indispensable military figures in modern history. In the mobile warfare of the 20th century no army could keep its vital supply routes open without the military policeman. This book documents the organisation, uniforms and insignia of the many and varied German military police units of World War II. Their duties included traffic control; maintaining military order and discipline; collection and escorting prisoners of war; prevention of looting; disarming civilians; checking captured enemy soldiers for documents; collection of fallen enemy propaganda leaflets and providing street patrols in occupied areas.