Secret police

Russia

Events

Third section

1855 - 1880

Okhrana

1881 - 1917

Cheka

1917 - 1922

GPU

1922 - 1923

OGPU

1923 - 1934

NKVD

1934 - 1943

NKGB

1943 - 1946

MGB

1946 - 1954

KGB

1954 - 1964