On this day, 545 years ago, October 8, 1480 (September 5, 1480, the lunar calendar), there was a confrontation on the Ugra River. On October 8, 1480, Ahema Khan of the Golden Horde led his army to confront Ivan III, the Grand Duke of Moscow, on the Ugra River. Later, he retreated without fighting. This battle declared that Moscow was completely free from the control of the Golden Horde Khanate. Ahemahan planned to bypass the Oka River from the west, avoiding Ivan's legions, so that he could join the Polish king Casimir. Ahema Khan's forces approached the Ugra River, and Russia's main line of defense turned from Nizhny Novgorod to the Ugra River. During the four-day battle, the Tatars tried to cross the Ugra River and were refused. The Principality of Moscow chronicles that Russia successfully used guns, but the Tatars did not. After the battle, Ahema Khan retreated to the town of Vorotynsk, where he decided to wait for Casimir's troops. Ivan III began negotiations with Khan and tried to restore his relationship with his rebellious brother, deciding not to cross the river but to continue to wait on the shore for his opportunity. Seeing more and more Russian and Polish troops arriving, Ahema Khan chose not to attack the Russians. Ahema Khan may have been waiting for the river to freeze so that it could be crossed, but Poland and Lithuania were threatened by Moscow's ally Crimean Khanate and were not supported. As winter approached, the Tatar army was short of supplies and suffered from infectious diseases. Ivan III gradually began to pull his troops back to Kremenets for the winter on October 28, and Ahema Khan waited for reinforcements until November 11, then turned south for fear of an attack by the Crimean Khanate on the capital. The Tartar retreat was seen as a victory for the Duchy of Moscow. Ivan and his army returned to Moscow to celebrate. On January 6, 1481, Ahema Khan was killed by Ibaq Khan of the Xiban family. In 1502, the Khanate of Crimea destroyed the capital of the Golden Horde, thereby eliminating the buffer zone between Russia and Crimea and causing a series of Russia-Crimea wars that lasted until 1784. In national history, the retreat of Ahema Khan served as the end of the so-called "Tartar yoke". It was considered an important milestone in the gradual decline of the Mongolian Empire.