When did the campaign of political  repression that Mikhail Demichev was arrested during occur?
Mikhail Demichev Mikhail Demichev (1885 – November 19, 1937) was a Soviet Komdiv (division commander). He fought in the Imperial Russian Army in World War I before going over to the Bolsheviks in the subsequent civil war. He was a recipient of the Order of the Red Banner. During the Great Purge, he was arrested on August 9, 1937 and later executed. After the death of Joseph Stalin, he was rehabilitated in 1956.
1980 Turkish coup d'état The 12 September 1980 Turkish coup d'état (Turkish: "12 Eylül Darbesi" ), headed by Chief of the General Staff General Kenan Evren, was the third coup d'état in the history of the Republic, the previous having been the 1960 coup and the 1971 "Coup by Memorandum". The 1970s in Turkey were marked by right-wing/left-wing armed conflicts, in the context of the Cold War. To create a pretext for a decisive intervention, the Turkish military allowed these conflicts to escalate; some say they actively adopted a strategy of tension. The violence abruptly stopped afterwards, and the coup was welcomed by some for restoring order. In total, 50 people were executed, 500,000 were arrested and hundreds died in prison.