FORMATION OF BORDER LINE BETWEEN KAZAKHSTAN AND SIBERIA IN 1920S - EARLY 1930S (THE CASE OF CHERLAKSKY DISTRICT)

The process of changing the border line of the Akmola province of the Kazak Autonomous Republic (until 1925 - the Kyrgyz Republic) of the Autonomous Republic with the adjacent territory of the Omsk District of the Siberian Territory (until 1925 - the Omsk Province), consisting in the transition of the Cherlak District (Stepanovskaya, Dobrovolskaya,