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 forecast political instability consequent to the election of Archbishop of Kraków Karol Wojtyla as the first Polish Pope, John Paul II, whom they had categorised as "subversive" because of his anti-Communist sermons against the one-party PUWP régime. Despite its accurate forecast of crisis, the Polish United Workers' Party (PUWP) hindered the KGB's destroying the nascent Solidarity-backed political movement, fearing explosive civil violence if they imposed the KGB-recommended martial law. Aided by their Polish counterpart, the Służba Bezpieczeństwa (SB), the KGB successfully infiltrated spies to Solidarity and the Catholic Church, and in Operation X co-ordinated the declaration of martial law with