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(historical) The first of a succession of Soviet state security organizations, created in 1917.
plural Chekas
An agent of this organization; a Chekist. quotations examples
Furthermore, in order to eliminate friction between the ECs of soviets and the Chekas in the provinces, Dzerzhinsky was appointed people's commissar of internal affairs […]
2015, Vladimir N. Brovkin, Behind the Front Lines of the Civil War