Middle Ages
Throughout the 14th century, French kings sought to expand their influence at the expense of the territorial holdings of the nobility. They ran into difficulties when attempting to confiscate the holdings of the English kings in southern France, leading to the Hundred Years' War, waged from 1337 to 1453. Early in the war the English under Edward III (r. 1327–77) and his son Edward, the Black Prince (d. 1376), won the battles of Crécy and Poitiers, captured the city of Calais, and won control of much of France. The resulting stresses almost caused the disintegration of the French kingdom during the early years of the war. In the early 15th century, France again came close to dissolving, but in the late 1420s the military successes of Joan of Arc (d. 1431) led to the victory of the French and the capture of the last English possessions in southern France in 1453. The price was high, as the population of France at the end of the Wars was likely half what it had been at the start of the conflict. Conversely, the Wars had a positive effect on English national identity, doing much to fuse the various local identities into a national English ideal. The conflict with France also helped create a national culture in England separate from French culture, which had previously been the dominant influence. The dominance of the English longbow began during early stages of the Hundred Years' War, and cannon appeared on the battlefield at Crécy in 1346.
Hundred Years' War (1337–1360)
The Black Death had reached England in 1348. The widespread effects of the plague had effectively put the war on hold. However, by the mid-1350s the disease had receded sufficiently to allow the country to start rebuilding its finances. So in 1355 Edward's son, Edward the Black Prince, resumed the war and invaded France from English-held Gascony and by August of that year he had begun a brutal campaign of raids known as "chevauchée". This campaign was designed to terrorise and demoralise the people, discredit their leaders and drain the French king's financial resources. Anything that was portable was looted and anything that could not be taken away was broken or burnt. An observer at the time said, of the Black Prince, that "as he rode to Toulouse there was no town that he did not lay waste."