The Bishopric of Warmia, previously part of the Monastic State of the Teutonic Knights, had, with the Second Peace of Thorn (1466), come under the protection of the King of Poland.
Poland contested von Tüngen's election, and this led to the War of the Priests (1467–79) and the First Treaty of Piotrków Trybunalski (1479), by which the chapter was obliged to seek consensus with the Polish king.
The Ottoman Empire was an ongoing threat and had taken over large parts of Europe, and the Bishop suggested that the Order "do battle with the Turks."
Poland sought to rescind the Prince-Bishopric's autonomy, hoping to force the surrender of its prerogatives to the Polish crown.
[citation needed] In this area of conflict, Watzenrode guarded the interests of Warmia and maintained friendly relations with Poland.
Watzenrode also took care of his son Philipp Teschner,[further explanation needed] whose mother was the daughter of the rector of the Johannes school in Thorn.