SMERSH

SMERSH was a counter-intelligence agency for the Soviet Union that primarily operated during World War II. It was disbanded in 1946.

Shortly after World War II, Dmitrij Volkov emerged in the employ of SMERSH. Volkov was credited with over 1,000 executions (primarily spies and Soviet dissidents).

Trivia

 * SMERSH is an acronym for death to spies. "Death to spies" was a phrase called out by members of the Soviet Army in No One Lives Forever 2: A Spy in H.A.R.M.'s Way when they spotted Cate Archer.

External link
SMERSH on Wikipedia