For 10 points—name this Mongol state which annihilated Moscow and Kiev to establish control over Russia.
Its decline began in the 1390s, when it lost the battles of Kondurcha and Terek to Tamerlane. Earlier, it expanded into Poland and Hungary by defeating the Teutonic Knights at the Battle of Liegnitz. Uzbeg converted it to Islam, less than a century after Batu established it. From its capital at Sarai Berke, it exacted regular tribute in a suzerainity arrangement. For 10 points—name this Mongol state which annihilated Moscow and Kiev to establish control over Russia.
Its decline began in the 1390s, when it lost the battles of Kondurcha and Terek to Tamerlane.
Empire of the {Golden Horde} [or {Kipchak} Khanate]