Mass operations of the People's Comissariate of Internal Affairs were carried out during the Great Purge and targeted specific categories of people. As a rule, they were carried out according to the c
A 31 January 1938 resolution by Central Committee of the Communist Party of the Soviet Union to extend the National operations of the NKVD until 15 April for the destruction of Polish, Latvian, German, Estonian, Finnish, Greek, Iranian, Harbinian, Chinese and Romanian "spy-saboteur contingent" signed by Joseph Stalin, Vyacheslav Molotov, Lazar Kaganovich, Kliment Voroshilov, Anastas Mikoyan and Vlas Chubar