In1944, when the fascists invaders were driven out from the territory of the USSR,
the Institute resumed its work in Stary Oskol town as Belgorod was destroyed during the war.
Since the Kiev prince Mstislav Stary was a figure that suited many, his
death provoked a new round of strife, and the years that passed from Kalka to the Western campaign of the Mongols in Russia were not used by the Russian princes to prepare to repel the invasion.