Despite the peace treaty, the relationship between the two countries remained tense. Sigismund I demanded Michael Glinski's extradition for trial, while Vasili III demanded better treatment of his widowed sister Helena. Vasili also discovered that Sigismund was paying Khan Meñli I Giray to attack the Grand Duchy of Moscow. At the same time, Albert of Prussia became the Grand Master of the Teutonic Order and was unwilling to acknowledge Poland's suzerainty as required by the Second Peace of Thorn (1466). The tension eventually resulted in the Polish–Teutonic War (1519–1521) and allied Maximilian I, Holy Roman Emperor with Vasili III.