Charles VI (reigned 1380–1422) was a minor when he succeeded his father. His uncles, each possessed of the ambition and resources to pursue independent policies, assumed control of the government. Louis II, duc d’Anjou, soon removed himself from influence by seeking the throne of Naples; Jean, duc de Berry, received the lieutenancy of Languedoc, by then virtually an appanage; and it was left to Duke Philip II (the Bold) of Burgundy to set the young king’s policy. He imposed his own cause upon the king in his policy toward Flanders (whose ruler, Count Louis II, was Philip’s father-in-law). An uprising by the workers of Ghent, spreading to other towns, was met by royal force that won a crushing victory at Roosebeke in 1382. The young king returned in triumph to deal forcefully with restive populations at Paris and Rouen and in Languedoc. The provostship of the merchants was suppressed at Paris, bringing that municipality under direct royal control.

In 1388 Charles VI assumed full authority himself. He recalled his father’s exiled advisers, the Marmousets, who undertook to reform the royal administration in keeping with the practice of Charles V. But the country was again wearying of taxation. The annual levies of Charles V had been discontinued in 1380 but then were reestablished—helping to cause the urban unrest already mentioned—and were being dissipated blatantly in royal and princely extravagance. In 1392 the king lost his sanity, a shocking event that aroused popular solicitude for the crown. His recurrent lapses into insanity, however, played into the hands of his uncles. Philip the Bold again dominated the council. Fortunately for France, England was incapable of renewing the war. The duke of Burgundy planned an invasion of England in 1386, but, after major preparations in Flanders, it came to nothing. A series of truces, beginning in 1388, was followed by a reconciliation between Richard II of England and Charles VI in 1396, when the truce was extended for 28 years. Meanwhile, French nobles were reviving the Crusade, imagining a reunited West following their lead; John the Fearless’s defeat at Nicopolis in 1396 was the most famous of several enterprises. To restore unity in the church, the masters of the University of Paris began to speak out vigorously; the conciliar theory (according to which the church was to be governed by an ecumenical council), which finally prevailed to end the schism, owed much to them.

When conflict with England was renewed in the 15th century, circumstances had changed. Henry IV of England was committed to the recovery of English rights in France; moreover, in a civil war between Louis I, duc d’Orléans, and John the Fearless (duke of Burgundy since 1404) over control of the king, both parties sought English support. And, when John arranged Orléans’s assassination in Paris (November 23, 1407), the popular horror magnified the conflict. John exploited the situation by pressing for reforms; his rival’s cause was taken up by Bernard VII of Armagnac, whose daughter married Orléans’s son. But John’s alliance with the turbulent Parisians was no more secure than the temper of the angriest burghers; a major ordinance for administrative reform (1413) collapsed in a riot of the butchers, and in the ensuing reaction the Armagnac faction regained control of Paris. John’s dangerous response was to encourage the new king of England, Henry V, to claim the French throne for himself. Henry’s invasion of 1415, reminiscent of the campaign ending at Crécy, had the same result—at Agincourt the French suffered yet another major defeat, after which, characteristically, the English withdrew—but the civil war in France enabled Henry V to exploit his strength, as Edward III had not been able to do. In 1418 the Burgundian party recovered control of Paris, and the dauphin Charles embarked on a long exile in Armagnac company.

John’s limitless duplicity led him to meet with the dauphin in 1419 and offer to betray the English, but he was assassinated by the dauphin’s followers. His successor, Philip III (the Good), renewed the alliance with Henry V. By the Treaty of Troyes (1420) the deranged Charles VI was induced to set aside the dauphin’s right of succession in favour of Henry V, who married Charles VI’s daughter. The ancient dream of a dynastic union between France and England seemed to be realized; and, when Henry and Charles died within weeks of each other in 1422, the infant Henry VI became king in both lands.