By August 20, the Moldavian forces under Stephen the Great defeated the Tatars at the battle of Lipnic. By the 1470s, Muscovy had stopped paying tribute to Sarai, but continued to maintain diplomatic relations with them.[8]: 70 In 1474 and 1476, Ahmed insisted that Ivan III of Russia recognize the khan as his overlord. In 1480, Ahmed organized a military campaign against Moscow, resulting in a face off between two opposing armies known as the Great Stand on the Ugra River.