Question: What years was this campaign of political repression in the Soviet Union occurring, during which Yakov Ganetsky was executed?

<P0-S0> 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. <P0-S1>  It involved a large-scale purge of the Communist Party and government officials, repression of peasants and the Red Army leadership, widespread police surveillance, suspicion of "saboteurs", "counter-revolutionaries", imprisonment, and arbitrary executions. <P0-S2>  Mobile gas vans were invented to execute people without trial. <P0-S3>  In Russian historiography, the period of the most intense purge, 1937–1938, is called Yezhovshchina (Russian: Ежовщина ; literally, "Yezhov phenomenon", commonly translated as "times of Yezhov" or "doings of Yezhov"), after Nikolai Yezhov, the head of the Soviet secret police, the NKVD, who was later killed in the purge. <P0-S4>  It has been estimated that 600,000 people died at the hands of the Soviet government during the Purge. <SEP> <P1-S0> The Red Terror was a period of political repression and mass killings carried out by Bolsheviks after the beginning of the Russian Civil War in 1918. <P1-S1>  Soviet historiography describes the Red Terror as having been officially announced in September 1918 by Yakov Sverdlov and ending about October 1918. <P1-S2>  However, the term was frequently applied to Bolshevik political repression during the whole period of the Civil War (1917–1922), as distinguished from the White Terror carried out by the anti-Bolshevik side. <P1-S3>  The Cheka (the Bolshevik secret police) carried out the repressions of the Red Terror. <P1-S4>  Estimates for the total number of people killed during the Red Terror range from 10,000 to over 1.5 million. <P1-S5>  The majority of the violence's targets were representatives of the Tsarist regime and former Tsarist officers, along with significant numbers of bourgeoisie. <SEP> <P2-S0> 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. <P2-S1>  After the October Revolution of 1917, Ganetsky served as Chief Soviet banker, trade representative and Ambassador to Latvia. <P2-S2>  On behalf of the Soviet government he signed the Peace of Riga and Treaty of Kars. <P2-S3>  His last post was that of a director of the Museum of the Revolution of the USSR, presently the State Historical Museum. <P2-S4>  He was executed during the Great Purge and was rehabilitated posthumously. <SEP> <P3-S0> Forced settlements in the Soviet Union took several forms. <P3-S1>  Though the most notorious was the Gulag labor camp system of penal labor, resettling of entire categories of population was another method of political repression implemented by the Soviet Union. <P3-S2>  At the same time, involuntary settlement played a role in the colonization of remote areas of the Soviet Union. <P3-S3>  This role was specifically mentioned in the first Soviet decrees about involuntary labor camps.