 The 18th and 19th centuries also saw the influx of a significant number of German immigrants both from Russia's Volga Regions and from abroad.In 1925 the Omsk governorate was dissolved into the newly formed Siberian Krai and again reorganized, this time as an Oblast by order of the All-Russian Central Executive Committee on December 7, 1934.Parts of the Ob-Irtysh Oblast and the West Siberian Krai as well as the southern part of Chelyabinsk Oblast were given over to Omsk.