During the twenties, due to power struggles and to devastated and later only stabilized economy, Moscow could afford only a moderate increase of military expenditures. Their rapid growth started in the late 1920s, and mainly in 1931 and 1932 in response to the Far East tension and, in particular, in connection with the start of qualitative modernization of the Red Army. Its weapons and equipment, dating mostly from the prewar time and only exceptionally improved, were replaced with new types, and a new type of armed forces also appeared: armored and mechanized units. Another stage of modernization started in 1936, apparently in response to the international situation. The military budgets were rapidly growing, the arms and equipment introduced in the RKKA in the early 1930s were now, in accordance with the international trend, replaced with a new generation. However, further development was delayed, and in some cases even stopped by the political repressions. As a result, the USSR was unable to immediately follow the new international trends that appeared in the mid-1930s, and the next stage of rearmament started only just before the outbreak of the war.
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