Possible Clues:

• KGB predecessor
• K.G.B. predecessor
• The secret police of the Soviet Union from 1923 to 1934
• Soviet secret police from 1923 to 1934
• Russian secret police from 1923 to 1934
• Secret police on horseback turn around
• Forerunner of the K.G.B.
• Police run away from rioting group
• Used to go up and up in the 33 down
• Russian secret police nineteen twenty two to nineteen thirty four; go up (anag.)