Tula Oblast was created on 1937-09-26.
Volyn Oblast was created in 1939.
Yaroslavl Oblast was created in 1936.
Tomsk Oblast was created in 1944.
Astrakhan Oblast was created in 1943.
Chelyabinsk Oblast was created in 1934.
Leningrad Oblast was created in 1927.
Kursk Oblast was created in 1934.
Murmansk Oblast was created in 1938.
Irkutsk Oblast was created in 1937.
Magadan Oblast was created in 1953.
Arkhangelsk Oblast was created in 1937.
Voronezh Oblast was created in 1934.