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Sleeper Agents

The use of sleeper agents by various countries and organizations, including Russia, the Soviet Union, and the US, for espionage and intelligence gathering purposes.

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Jan 20, 2026
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Which countries have historically used sleeper agents and what methods do they employ?

Sleeper agents have been a recurrent instrument of statecraft from the 20th century to today, used most prominently by Soviet and Russian services but also deployed or feared from Western intelligence...