MI11

MI11, or Military Intelligence, section 11, was a department of the British Directorate of Military Intelligence, part of the War Office and acted as Field Intelligence Police. It was responsible for protecting British troops against the enemy agents amongst civilian population during and in the theatre of war. MI11 replaced the role formerly assigned to the Field Security, which itself replaced the British Army's Intelligence unit before World War I. Section 11 was disbanded after World War II.