 Moscow extended its influence to the Principality of Ryazan in 1456, annexed the Novgorod Republic in 1477, and annexed the Principality of Tver in 1483.Further expansionist goals of Ivan III clashed with the Lithuanian interests.Around 1486–87, territories along the ill-defined Lithuanian–Muscovite border in the upper reaches of the Oka River were under attack by Moscow and its ally Meñli I Giray, khan of the Crimean Khanate.