Saintonge War
In English history, the ‘Hundred Years’ War’ refers to the 116-year period between 1337 – 1453. In some French accounts, that period of conflict is referred to as the ‘Second Hundred Years’ War’, the first embracing the period of upheaval following the change in the balance of power between the French and English thrones from 1159 to 1259 after Henry II of England married Eleanor of Aquitaine gaining many French territories in the process and achieving territorial superiority over the French Kingdom, until the Treaty of Paris (1259), in which the opposite became true. This period saw many conflicts and battles between the two kingdoms such as the Anglo-French War (1202–1214) or the Battle of Bouvines.
House of Valois
Because diplomacy and negotiation had failed, Edward III would have to back his claims with force to obtain the French throne. For a few years, England and France maintained an uneasy peace. Eventually, an escalation of conflict between the two kings led to the confiscation of the duchy of Aquitaine (1337). Instead of paying homage to the French king, as his ancestors had done, Edward claimed that he was the rightful King of France. These events helped launch the Hundred Years' War (1337-1453) between England and France. Though England failed to win that prolonged conflict, English and British Monarchs until the late 18th Century continued to maintain, at least formally, a claim to the French throne.