Active reserve (KGB) officers with a military rank who worked undercover in the Soviet Union. "Trusted contacts" were high placed civilians who collaborated with the KGB without signing any official working agreements, such as directors of personnel departments at various institutions, academics, deans, or writers and actors. Informers were citizens secretly recruited by the KGB, sometimes using forceful recruitment methods, such as blackmail. The precise number of people from various categories remains unknown, but one of the estimates was 11 million "informers" in the Soviet Union, or one out of every eighteen adult citizens The active reserve was established by Yuri Andropov in
Politburo of the Communist Party of the Soviet Union candidate member since 1967). Alexander Shelepin had served as KGB Chairman, but was elected to the Politburo through his work in the Komsomol, while Eduard Shevardnadze, who had served as the Georgian Minister of Internal Affairs until 1972, became a candidate member of the Politburo through his work as First Secretary of the Georgian Communist Party. Similarly in 1973, the Minister of Defense Andrei Grechko was appointed to the Politburo. However, unlike the security sector, the military sector had had representatives in the Politburo since the 8th Politburo (in 1919). Defense ministers who had served in the Politburo are Leon