It has taken the Mongols a year…
November 1237 CE
It has taken the Mongols a year to extinguish the resistance of the Volga Bulgars, Kipchaks, and Alani; the survivors have fled to the west.
After destroying the Bulgar state and its capital, Batu, joining with the Mongol forces of Möngke and General Subedei, pauses to consolidate control and establish Mongol suzerainty.