Dmitry RyabyshevDmitry Ivanovich Ryabyshev was a Soviet military commander, commander of 8th Mechanized Corps.Before World War IIRyabyshev was born in Kolotovka, Don Host Oblast, Russian Empire His family were Cossacks and he joined the Imperial Russian Army during the First World War. In October 1917 he joined the Red Army. Ryabyshev was a commander of the 42nd Brigade, 14th Division of the 1st Cavalry Army during the Russian Civil War. In the inter-war years he studied at the Frunze military academy on Moscow and commanded a number of cavalry units.World War IIIn June 1940 he was appointed to command 8th Mechanized Corps and fought with that unit near Lutsk and Brody during the German invasion in 1941. After his corps was destroyed he was given command of 38th Army and, briefly, Southern Front in September 1941. Towards the end of 1941 he was given the task of raising 57th Army, which he led to success in the Barvenkovo–Lozovaya offensive of January 1942. During the war he also commanded the 34th Tank Division, 4th Cavalry Corps, 28th Army and 3rd Guards Army.