伊凡三世
In 1465, Ahmed Khan seized power in the Horde by rising against his brother Mahmud bin Küchük, who had been its ruler since 1459. In 1472, Ahmed Khan entered into alliance with the Polish king Casimir IV against Ivan III of Russia. In 1476, Ahmed Khan suggested to Ivan III that he should recognize him as his overlord. However the situation of forces was not in the Horde's favour.