What years was this campaign of political repression in the Soviet Union occurring, during which Yakov Ganetsky was executed?
Yakov Ganetsky: Yakov Stanislavovich Ganetsky (also transliterated as Hanecki), also known as Jakub Fürstenberg (Fuerstenberg) (15 March 1879 — 26 November 1937) was a prominent Old Bolshevik and close associate of Vladimir Lenin, famous as one of the financial wizards who arranged, through his close working relationship with Alexander Parvus, the secret German funding that saved the Bolsheviks. Yakov Ganetsky:  He was executed during the Great Purge and was rehabilitated posthumously. Great Purge: The Great Purge or the Great Terror (Russian: Большо́й терро́р ) was a campaign of political repression in the Soviet Union which occurred from 1936 to 1938.
1936 to 1938