According to
Pavel Sudoplatov, NKVD officers Victor Ilyin and Mikhail Maklyarsky conceived Operation Berezino as an extension of
Operation Monastyr ("Operation Monastery") (1941–1944). In 1941, NKVD operative (, Soviet
codename Heyne), who disguised himself as a disgruntled
bohemian socialite, established contact with the German
resident in Moscow. The NKVD used this opportunity to expose the
Abwehr undercover network in the
Soviet Union. In December 1941, Demyanov "defected" to the Germans and showed up at the
Abwehr field office in
Smolensk, a city in western
Russia near the border with present-day
Belarus. Three months later, he returned to Moscow as a trusted German agent. His apartment became a death trap for scores of genuine German agents, but he retained the trust of his German superiors. In the middle of 1942, Demyanov's control officer,
Willie Fischer, expanded the operation into a strategic level disinformation campaign. For more than two years, Demyanov supplied
Reinhard Gehlen, the head of
Fremde Heere Ost (Foreign Armies East) department with carefully-scripted "military plans." According to Sudoplatov, the German success in repelling
Operation Mars was, in part, influenced by "correct" information fed to Gehlen through Demyanov. According to Sudoplatov,
Joseph Stalin personally monitored the progress of Operation Monastyr. The NKVD men who engaged in it were highly rewarded, but Stalin was dissatisfied with the limited scope of the operation. Shortly before the beginning of
Operation Bagration, he summoned
Victor Abakumov,
Vsevolod Merkulov,
Fyodor Fedotovich Kuznetsov, and Sudoplatov and ordered a new disinformation campaign. Stalin's instructions, recorded by
Sergei Shtemenko, shifted the objective toward methodical physical destruction of German special forces and their intelligence capability. Sudoplatov had to set up a believable "German camp" behind the advancing Soviet troops and call the German command for help. Stalin reasoned that the Germans would expend their best
commandos in futile rescue missions. The fake "camp" would also divert German
airlift resources from supporting the real
pockets of resistance. ==Planning==