Philip VI of Valois (1328-1350), to the throne and, initially, Edward acknowledged Philip VI of Valois (1328-1350) as the French king. Since Flanders was the chief market for English wool and export taxes on wool comprised a large part of the English royal revenues, the English king took a great interest in Flemish affairs and resented French interference.ДЄnother incentive for war developed when, in 1328, KingД®dward III (1327-1377) of England became a potential heir to the French throne with the death ofД¬apetian.

Despite a long-standing claim by French monarchy to supreme authority over the Flemish, Flanders had established a strong trading alliance with the English in the wool trade. The conflicting claims led to an inconclusive war between 12 and again led to conflicts in the Hundred Years' War.ДЄ second source of friction also had a commercial foundation. Gascony enjoyed a profitable trade relationship with England, doing a brisk business in Bordeaux wine and fine English cloth. One source of friction between the French and English was the Duchy of Gascony, where both nations claimed control. The outbreak of the Hundred Years' War can be attributed to several factors. Even when a truce was in effect, mercenary bands pillaged the countryside. All the fighting took place on French soil, placing a heavy burden on the French population.

It was actually several lengthy campaigns interrupted by periods of peace and truve. The Hundred Years' War was part of a rivalry between England and France that dated from the Norman conquest of England. End of Europe's Middle Ages - Hundred Years' War

Map of 100 years war