Vladimir vetrov farewell dossier

Early 1980s leak of classified documents exposing the USSR's copying of Western technology

The Farewell Dossier was the collection of documents that Colonel Vladimir Vetrov, a KGBdefector "en place" (code-named "Farewell"), gathered and gave to the Direction de la surveillance du territoire (DST) in 1981–82, during the Cold War.

Vetrov was an engineer who had been assigned to evaluate information on NATO hardware and software gathered by the "Line X" technical intelligence operation for Directorate T, the Soviet Union directorate for scientific and technical intelligence collection from the West.

He became increasingly disillusioned with the Soviet system and decided to work with the French at the end of the 1970s. Between early 1981 and early 1982, Vetrov gave almost 4,000 secret documents to the DST, including the complete list of 250 Line X officers stationed under legal cover in embassies around the world.

As a consequence, Western nations undertook a