Operation Trust (операция "Трест") was a counterintelligence operation of the State Political Directorate (GPU) of the Soviet Union. The operation, which ran from 1921 to 1926, set up a fake anti-Bolshevik resistance organization, "Monarchist Union of Central Russia", MUCR (Монархическое объединение Центральной России, МОЦР), in order to help the OGPU identify real monarchists and anti-Bolsheviks.