Adolph II
On 4 July 1460, Frederick I, Elector Palatine defeated Dieter von Isenburg in the Battle of Pfeddersheim. But in the fall of 1461, Pope Pius II replaced Dieter as archbishop of Mainz with Adolph II of Nassau. In his desire to reclaim his former position, Dieter sought Frederick's assistance and handed over substantial territories to the Palatinate as payment. Irritated by this defiance, the pope excommunicated both Dieter and Frederick in early 1462. At the same time, the pope's ally Frederick III, Holy Roman Emperor declared war on the two. Ulrich V, Count of Württemberg, Louis I, Count Palatine of Zweibrücken, Charles I, Margrave of Baden-Baden and his brother George of Baden, Bishop of Metz formed a coalition against Frederick and in favor of Adolph II.