When his brother died in 1417 and was succeeded by his daughter
Jacqueline as countess of Holland and Hainaut, John the Pitiless rejected
holy orders and surrendered his bishopric. In 1418, John III married
Elisabeth, Duchess of Luxembourg, who was then the widow of
Antoine, Duke of Brabant. No children came from this marriage. With the aid of
Emperor Sigismund, who was his wife's uncle, John III immediately started a war against his niece Jacqueline and her husband Duke
John IV of Brabant. John the Pitiless supported the city of
Dordrecht and Duke Philip the Good of Burgundy. A siege of Dordrecht in 1419 was unsuccessful, so John IV of Brabant agreed to start a joint administration with John III. Jacqueline, as a woman, did not get a share in the political responsibility. John IV of Brabant finally gave up Holland and Hainaut and left the rule to John the Pitiless. Jacqueline went to England in 1421 and married the king's brother,
Humphrey, Duke of Gloucester. She was unable to retain control over Holland and Hainaut much longer after John's death. ==Death and legacy==