 In 1485, King Casimir undertook an expedition into Moldavia after its seaports were overtaken by the Ottoman Turks.The Turkish-controlled Crimean Tatars raided the eastern territories in 1482 and 1487 until they were confronted by King John Albert, Casimir's son and successor.Poland was attacked in 1487–1491 by remnants of the Golden Horde that invaded Poland as far as Lublin before being beaten at Zaslavl.