Forerunner of the K.G.B., 4 letters
Forerunner of the NKVD and KGB, 4 letters
Former U.S.S.R. secret police, 4 letters
K.G.B. predecessor, 4 letters
KGB forerunner, 4 letters
KGB precursor, 4 letters
KGB's old name, 4 letters
Lenin's police org., 4 letters
N.K.V.D.'s predecessor, 4 letters
Old Russian secret-police org., 4 letters
Old Soviet secret police org., 4 letters
Pre-K.G.B. group, 4 letters
Precursor to the KGB, 4 letters
Predecessor of MVD, 4 letters
Secret police of 1920s Russia, 4 letters