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
Edward invaded France, for the third and last time, hoping to capitalise on the discontent and seize the throne. The Dauphin's strategy was that of non-engagement with the English army in the field. However, Edward wanted the crown and chose the cathedral city of Reims for his coronation (Reims was the traditional coronation city). However, the citizens of Reims built and reinforced the city's defences before Edward and his army arrived. Edward besieged the city for five weeks, but the defences held and there was no coronation. Edward moved on to Paris, but retreated after a few skirmishes in the suburbs. Next was the town of Chartres. Disaster struck in a freak hailstorm on the encamped army, causing over 1,000 English deaths – the so-called Black Monday on Easter 1360. This devastated Edward's army and forced him to negotiate when approached by the French. A conference was held at Brétigny that resulted in the Treaty of Brétigny (8 May 1360). The treaty was ratified at Calais in October. In return for increased lands in Aquitaine, Edward renounced Normandy, Touraine, Anjou and Maine and consented to reduce King John's ransom by a million crowns. Edward also abandoned his claim to the crown of France.