John III, Duke of Bavaria

As the youngest son of three, John was destined for a career in the church. At the age of 15, he became Prince-Bishop of Liège, with the support of Pope Boniface IX. John's rule was a disaster. His authoritarian style clashed with the nobles and burghers of the Prince-Bishopric. He was expelled several times and saw even a counter-bishop being elected. John turned for help to his brother and brother-in-law.

In 1408 a Burgundian army led by his brother-in-law John the Fearless went to the aid of John III against the citizens of Liège, who were in open revolt. On the field of Othée, on 12 September 1408, the men of Liège were decisively defeated, and Burgundian influence was extended over the city and over the bishopric of Liège. The ensuing executions of leading insurgents led to John's nickname "the Pitiless".