A catalog of indicators of NATO preparation for nuclear war that were monitored by Warsaw Pact intelligence services under Project RYaN. The activity is divided into the following areas: political and military, activities of intelligence services, civil defense, and economic.

This speech by East German Minister of State Security Mielke is about technological, intellectual, and ideological preparations for war by the west and how to uncover and organize indicators of a potential attack.

This brief note written by the Ministry of State Security includes a number of questions for the leadership of the KGB in the USSR, such as whether other elements, like military doctrine or emergency responses, should be examined as possible options for starting a war.

Memorandum summarizing consultations between the Stasi and KGB over RYAN (Raketno-Yadernoe Napadenie, or “nuclear weapon attack”), an intelligence program initiated by the KGB to collect indicators of a potential nuclear first-strike by the US. The KGB had developed a new system for the early detection of war preparations for a first-strike attack, which should provide evidence of such preparations on the basis of “objective” indicators that would be hard to manipulate.