 In 1497, King John Albert made an attempt to resolve the Turkish problem militarily, but his efforts were unsuccessful; he was unable to secure effective participation in the war by his brothers, King Vladislas (Władysław) II of Bohemia and Hungary and Alexander, the Grand Duke of Lithuania, and he also faced resistance on the part of Stephen the Great, the ruler of Moldavia.More destructive Tatar raids instigated by the Ottoman Empire took place in 1498, 1499 and 1500.Diplomatic peace efforts initiated by John Albert were finalized after the king's death in 1503.