Military Police units worked to keep the peace in Europe from the occupation after World War II to the end of the Cold War. This text examines the MPs, from the arrival of the U.S. Constabulary, which was the only law enforcement force on the continent. It provides unit histories, discusses the advancement of law and order programs, and covers the provision of nuclear weapons security, customs regulations and traffic enforcement. Robert L. Gunnarsson, Sr., served as an MP in the 1960s and later worked in law enforcement. He is a writer and researcher.