How did foreign intelligence help the Soviet Union maintain military parity with the West?

Foreign intelligence played a pivotal role in helping the Soviet Union maintain rough military parity with the West by facilitating the acquisition of critical scientific and technical information. Through its extensive foreign intelligence operations, the KGB repeatedly procured advanced technology essential for the development of Soviet submarines, airplanes, and rockets.12

This intelligence-gathering effort was supported by:

• Technical and Scientific Espionage: The KGB actively sought out secrets from both adversaries and allies, allowing the Soviet military to bridge technological gaps.2
• Human Intelligence: The agency successfully infiltrated major Western intelligence operations and placed agents of influence in key capitals. While some officers, such as the GRU colonel Oleg Vladimirovich Penkovsky, provided the West with invaluable data on Soviet military weaknesses, the KGB’s own network was instrumental in keeping the Soviet Union competitive in nuclear and other weapons systems.213
• Analysis of Foreign Matériel: Intelligence derived from the study of foreign weapon systems allowed the Soviet Union to better understand and develop countermeasures against Western military capabilities.4