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.
Cold War (1985–91) The Cold War period of 1985–1991 began with the rise of Mikhail Gorbachev as leader of the Soviet Union. Gorbachev was a revolutionary leader for the USSR, as he was the first to promote liberalization of the political landscape (Glasnost) and capitalist elements into the economy (Perestroika); prior to this, the USSR had been strictly prohibiting liberal reform and maintained an inefficient centralized economy. The USSR, despite facing massive economic difficulties, was involved in a costly arms race with the United States under President Ronald Reagan. Regardless, the USSR began to crumble as liberal reforms proved difficult to handle and capitalist changes to the centralized economy were badly transitioned and caused major problems. After a series of revolutions in Soviet Bloc states, and a failed coup by conservative elements opposed to the ongoing reforms, in New Years Eve the Soviet Union collapsed in 1991 and the Cold War came to an end.