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
First Chief Directorate of the FCD. After 14 years in FCD Hq, he was to become chairman of the KGB in 1988. Kryuchkov joined the Soviet diplomatic service, stationed in Hungary until 1959. He then worked for the Communist Party headquarters in Ukraine for eight years before joining the KGB in 1967. In 1988 he was promoted to General of the Army rank and became KGB Chairman. In 1989–1990, he was a member of Politburo. The next and last head of FCD was born on March 24, 1935, in Moscow Leonid Shebarshin. According to published sources, the KGB included the following directorates and