Operation Border Stone, also known as Operation Kamen (Czech: Akce Kámen) was an operation of the intelligence services of the Czechoslovak Republic during the Cold War, lasting from 1948 to 1951. According to some sources, the operation continued until 1958.
Operation Border Stone, also known as Operation Kamen (Czech: Akce Kámen) was an operation of the intelligence services of the Czechoslovak Republic during the Cold War, lasting from 1948 to 1951. According to some sources, the operation continued until 1958.
Source: Wikipedia "Operation Border Stone" · CC BY-SA 4.0
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