Thus, the takeover triggered a series of conflicts between Poland and the Teutonic Order, and these conflicts in turn triggered a conflict within the order itself. Some prominent brethren favoured a concession of Pomerelia in exchange for good relations with Poland, but were opposed by a majority of the knights who thought that such a concession would eventually lead to the total expulsion of the knights from their state. These disagreements caused the abdication of Grand Master Charles of Trier in 1318 and the murder of the succeeding Grand Master Werner of Orseln in 1330. The possession of Danzig and Pomerelia by the Teutonic Order was questioned consistently by the Polish kings Władysław I and Casimir the Great in legal suits in the papal court in 1320 and 1333. Both times, as well as in 1339, the Teutonic Knights were ordered by the Pope to return Pomerelia and other lands back to Poland, but did not comply. As a result, in the late 1330s, a war ensued.