 Margaret's father-in-law died in 1422, and the English occupied a part of France in the name of his infant grandson, King Henry VI of England, who was to succeed him according to the Treaty of Troyes.At the same time, Margaret's brother-in-law Charles VII claimed the crown for himself.In early 1423, Philip the Good entered into an alliance with Duke John V of Brittany and Henry's regent, John of Lancaster, 1st Duke of Bedford.