Muscovy Faces Down the Horde on the Ugra River

In the autumn of 1480, two substantial armies gathered along the banks of the Ugra River, southwest of Moscow. Grand Prince Ivan III of Moscow positioned his forces along this natural water boundary to halt an approaching army led by Akhmat Khan, ruler of the Great Horde, a steppe successor state of the Golden Horde. Muscovy had ceased paying tribute to the Horde during the 1470s, prompting Akhmat to mount an expedition northward to reassert his authority. The confrontation developed along a river line that formed part of the southern defensive barrier guarding the roads toward the Muscovite capital.

Muscovy faced acute internal strain when news of the impending invasion first arrived in late spring. Ivan III had been locked in a bitter political dispute with his brothers, Andrey Bolshoy and Boris of Volotsk, while Akhmat sought an alliance with Grand Duke Casimir IV of Poland and Lithuania. During the autumn, however, Ivan reconciled with his brothers, who marched their forces to join him. To secure the rear, Ivan also ordered raiding detachments down the Volga and Oka rivers, while evacuating vulnerable populations and sending the grand prince's treasury north toward Beloozero.