that year. By 1940, Stalin began to relent, restoring approximately one-third of previously dismissed officers to duty. However, the effect of the purges would soon manifest itself in the Winter War of 1940, where Red Army forces generally performed poorly against the much smaller Finnish Army, and later during the German invasion of 1941, in which the Germans were able to rout the Soviet defenders partially due to inexperience amongst the Soviet officers. Weapons and equipment The Soviet Union expanded its indigenous arms industry as part of Stalin's industrialisation program in the 1920s and 1930s. See also German mistreatment of Soviet prisoners of war Soviet war crimes Soviet repressions of Polish citizens (1939–1946) M School Signal Corps Administration (Red Army) Units Military units and formations of the Soviet Union by size Military units and formations of the Soviet Union in World War II Military districts of the Soviet Union Soviet fronts Field armies of the Soviet Union Army corps of the Soviet Union Explanatory notes Citations General and cited references . . . . . . . . . . . . . . . . . . . . . . . . External links Red Army Newsreels // Net-Film Newsreels and Documentary Films Archive Soviet Army Military of the Soviet Union Military units and formations established in 1918 Disbanded armies Military wings of socialist parties Soviet units and formations of the Russian Civil War