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.
Ivan Zhukov Ivan Pavlovich Zhukov (1889 – October 30, 1937) was a Soviet politician. He was a member of the Central Committee elected by the 17th Congress of the All-Union Communist Party (Bolsheviks). He received the Order of Lenin in 1931. During the Great Purge, he was arrested on June 21, 1937, sentenced to death on October 29, 1937 and executed by firing squad the following day. After the death of Joseph Stalin, he was rehabilitated in 1956.