Guy, Count of Flanders

[1][2] The death of his elder brother William in a tournament made him joint Count of Flanders with his mother.

This led to a devastating trade war with England, which supplied most of the wool for the Flemish weavers.

The dispute was ended by a treaty agreed at Montreuil-sur-Mer on 28 July 1274, effectively abolishing customs charged on English merchants in Flanders.

The French under Robert II, count of Artois, defeated the Flemish at the 20 August 1297 Battle of Furnes, and Edward's expedition into Flanders was abortive.

Both Philip and Edward had resorted to independently taxing the clergy and Pope Boniface VIII's initial response, the bull Clericis Laicos, had only led to the outlawing of most English clerics and a French embargo on the export of precious metals and jewels that damaged Boniface's own finances.

Under close papal supervision, France and England accepted a 3-year status quo ante armistice in October 1297.