Code name for a disinformation operation of the Czechoslovak foreign intelligence. Thanks to the change of sides of maj. Ladislav Bittman alias “Brychta“, former deputy chief of Section 8 of Directorate I of the ministry of interior in 1968, operation “Neptun“ became the best known disinformation action. In 1964, the foreign intelligence together with the KGB prepared the “discovery“ of purported archival materials of the Reichssicherheitshauptamt from the end of WWII in the Black lake in the Bohemian forest. It was presented at a press conference by minister of interior Lubomír Štrougal. The action started another campaign against selected persons in the Federal Republic of Germany.
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