Treaty of Christmemel

[3] The Teutonic Knights were a natural ally of Švitrigaila as they wanted to undo the Polish–Lithuanian union, established in 1385, which led to their defeat in the 1410 Battle of Grunwald and 1422 Gollub War.

However, Grand Master Paul von Rusdorf delayed and consulted with the Livonian Order, Sigismund, Holy Roman Emperor, prince-electors, and Pope Martin V.[3] Livonian Order advised to support Švitrigaila but also not to sever the relationship with Poland, Sigismund and prince-electors supported the alliance, while the pope opposed it.

Towards the end of May 1431, Rusdorf personally met with Švitrigaila but again refused to enter into an agreement motivating that he needed to discuss the proposals with Prussian estates.

The treaty was signed by Rusdorf, Livonian Master Zisse von Rutenberg, and Prussian bishops (notably Johannes Ambundii, Archbishop of Riga, did not participate).

[3] Nine Lithuanian nobles were: Castellan of Vilnius Kristinas Astikas, Elder of Vilnius Jurgis Gedgaudas, Elder of Samogitia Mykolas Kęsgaila, Voivode of Trakai Jaunius Kęsgaila, Castellan of Trakai Sungaila, Grand Marshal of Lithuania Rumbaudas Valimantaitis, Chodko Jurewicz, regent of Navahrudak Petras Mantigirdaitis, court marshal Jonas Goštautas.

[5] Following the Treaty of Christmemel, the Knights invaded Poland and ravaged the Dobrzyń Land before suffering a defeat in the Battle of Nakel in September 1431.