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
KGB a "friend of the cause" or as "agents provocateurs", who would infiltrate the target group to sow dissension, influence policy, and arrange kidnappings and assassinations. Mindful of ambitious spy chiefs—and after deposing Premier Nikita Khrushchev—Secretary Leonid Brezhnev and the CPSU knew to manage the next over-ambitious KGB Chairman, Aleksandr Shelepin (1958–61), who facilitated Brezhnev's palace "coup d'état" against Khrushchev in 1964 (despite Shelepin not then being in the KGB). With political reassignments, Shelepin protégé Vladimir Semichastny (1961–67) was sacked as KGB Chairman, and Shelepin himself was demoted from chairman of the Committee of Party and State Control to Trade Union