@history_of_revolution on Instagram: "The "Polish Operation" was a systematic campaign of ethnic cleansing and mass murder of Poles and others with Polish ties within the Soviet Union. The operation, orchestrated by the NKVD (the Soviet secret police) under Joseph Stalin's regime, was the largest of the so-called "national operations" of the Great Purge. According to historian Bogdan Musiał: "It is estimated that Polish losses in the Ukrainian SSR were about 30%, while in the Belorussian SSR...