Oblast means district or area. So Chersonskaja Oblast is a district in what is now Ukraine. It is south of Kiev and north of the Crimea.
Volyn Oblast was created in 1939.
The area of Lviv Oblast is 21,833 square kilometers.
The population of Volyn Oblast is 1,036,891.
Novosibirsk Oblast was created in 1937.
Kirov Oblast was created in 1934.
Volgograd Oblast was created in 1937.
Astrakhan Oblast was created in 1943.
Magadan Oblast was created in 1953.
Voronezh Oblast was created in 1934.
Arkhangelsk Oblast was created in 1937.
Kursk Oblast was created in 1934.
Murmansk Oblast was created in 1938.