Table of Contents
Introduction
The Hundred Years' War was a long series of conflicts between the kingdoms of England and France that took place from 1337 to 1453. It did not consist of one continuous battle, but of repeated phases of warfare separated by truces and negotiations. At its heart were disputes over who should rule France and how far English kings could control lands on the European mainland. The war reshaped both kingdoms, altered military practices, and weakened the older feudal order that had defined much of medieval society.
Causes and Claims to the French Throne
The roots of the conflict lay in tangled dynastic and feudal relationships. For centuries, English kings had held lands in France, originally as dukes and counts who owed feudal homage to the French king. By the early fourteenth century, the French monarchy wanted to assert tighter control over these territories, while English monarchs tried to defend or expand their authority there.
When the French king Charles IV died in 1328 without a surviving son, a succession problem followed. His closest male relative in the direct male line did not exist, so French nobles chose Philip VI, a cousin from the Valois branch of the royal family. The English king Edward III also had a claim, because his mother was Charles IV’s sister, making him a grandson of a French king. French lawyers and nobles argued that royal inheritance should not pass through the female line. Edward III disagreed and eventually pressed his own claim to the French crown, giving the dispute a powerful personal and dynastic character.
Economic friction intensified these tensions. The English economy depended heavily on exporting wool to cloth-making towns in Flanders, in what is now Belgium. Those towns were part of the French king’s sphere of influence. Control of trade routes, ports along the English Channel, and tax revenues all became part of the struggle. Political alliances on the European continent, especially in Flanders and among small principalities, helped pull both kingdoms into open war.
Phases of the War
Although people refer to a single Hundred Years' War, it unfolded in several distinct phases. These periods alternated between intense fighting and stretches of uneasy peace.
The first phase ran from the late 1330s into the mid fourteenth century. Edward III launched campaigns against France, seeking to assert his claim and weaken Philip VI. Fighting broke out at sea and on land. Raiding expeditions, sieges, and large battles appeared across northern and southwestern France.
A second major phase followed temporary settlements, particularly after the Treaty of Brétigny in 1360. That treaty granted England significant territories and ransomed the captured French king John II, but it did not solve the underlying disputes. When tensions resumed, France under Charles V and his advisers focused on gradual reconquest rather than large open battles.
Later, in the early fifteenth century, a new English king, Henry V, revived the conflict. His campaigns formed another intense phase, including major victories and new treaties. The war then moved into a final period in which French fortunes revived, partly under the influence of Joan of Arc and later capable commanders. By 1453, the French had pushed the English out of almost all their continental possessions, except the port of Calais.
Major Battles and Military Turning Points
Several battles became famous for revealing changes in medieval warfare. They also marked turning points in the fortunes of England and France.
In 1346, at the Battle of Crécy, Edward III’s forces faced a larger French army. The English used disciplined infantry and large numbers of longbow archers. The longbow allowed arrows to be shot rapidly and at a long range, piercing armor under the right conditions. French reliance on heavily armored cavalry suffered in the face of this tactic. Crécy demonstrated that massed archers and careful positioning could defeat traditional knightly charges.
Another important engagement came at the naval Battle of Sluys in 1340, where the English fleet defeated the French, giving England control of the Channel and helping secure crossings to the continent. Control of the seas was crucial for moving troops and supplies.
In 1356, at the Battle of Poitiers, the English prince known as the Black Prince captured the French king John II. This shocking event weakened the French monarchy and increased English bargaining power. The capture of a king demonstrated the risks of personally leading armies and contributed to later caution among rulers.
During the early fifteenth century, Henry V won a celebrated victory at the Battle of Agincourt in 1415. The English army, again relying on longbow archers and defensive positions, defeated a larger French force in muddy conditions that hindered heavily armored men-at-arms. Agincourt renewed English confidence and allowed Henry V to negotiate the Treaty of Troyes, which recognized him as heir to the French throne. However, his early death meant that this settlement did not produce a durable Anglo French monarchy.
As the war continued, outright pitched battles became less common. Instead, sieges, smaller engagements, and campaigns aimed at gradually retaking fortified towns and castles dominated the later years. French artillery improved, and gunpowder weapons began to play a more significant role in sieges, undercutting older defensive strategies.
Role of Joan of Arc and French Revival
One of the most striking episodes of the war involved Joan of Arc. She was a young peasant woman from northeastern France who claimed to have visionary guidance urging her to support the French crown. At a time when the French monarchy was weakened and deeply divided between factions centered on different regions and cities, Joan’s appearance gave new energy to the cause of Charles VII, the uncrowned French heir.
In 1429, Joan visited Charles and persuaded him to allow her to join a relief force sent to the besieged city of Orléans. The French troops, inspired by her presence and by religious fervor, broke the English siege. This success boosted morale and changed the psychological balance of the war. Soon after, Joan accompanied Charles to Reims, a traditional coronation site, where he was crowned as King of France, strengthening his claim in the eyes of many subjects.
Joan was eventually captured by forces allied with England, tried for heresy, and executed by burning in 1431. Her death did not reverse French gains. Instead, she became a symbol of resistance and divine favor in French memory. Later, the French monarchy and the Church reassessed her case, and she was declared innocent and seen as a martyr. In the context of the war, her role mattered less for specific military tactics and more for rallying support to a particular claimant and restoring confidence in the French cause.
Political and Social Consequences
The Hundred Years' War had deep political and social effects on both England and France. It transformed how kings ruled, how armies were raised and paid, and how people thought of their own communities.
In France, long periods of foreign occupation and civil strife encouraged a stronger sense that the kingdom was a single realm to be defended. The French crown gradually built more direct control over taxation and military organization. By the end of the war, the monarchy emerged with greater authority, while many great nobles who had once acted semi independently were weakened by losses and confiscations.
In England, the war had more ambiguous results. Early victories created a sense of national pride, but the eventual loss of almost all lands in France produced discontent. Heavy taxation, the need to maintain armies abroad, and the strains of war contributed to tensions within English society. After the end of the war, rival noble houses contested for power, leading into the internal conflict later known as the Wars of the Roses.
The war also affected ordinary people. Fighting, raids, and shifting fronts meant that peasants and townsfolk in many regions of France endured destruction of crops, burning of villages, and chronic insecurity. Mercenary soldiers who were not paid regularly sometimes turned to plundering the countryside. In both kingdoms, people experienced rising taxes, new forms of royal administration, and notices of musters and levies connected to ongoing campaigns.
Ideas about political legitimacy developed during this time. Competing claims to the throne forced lawyers, churchmen, and nobles to argue about inheritance rules, oaths of loyalty, and the proper relationship between king and realm. The notion that a kingdom existed as a community with its own interests, separate from the personal holdings of a dynasty, grew more visible during and after the conflict.
Military Change and the Decline of Feudal Warfare
The Hundred Years' War highlighted and accelerated important changes in medieval warfare. At the beginning of the war, armies were still heavily influenced by feudal methods, in which nobles provided armored cavalry in exchange for land and privileges. Over time, monarchs increasingly relied on paid professional soldiers, including archers, infantry, and eventually artillery specialists.
The English use of the longbow showed that properly trained commoners could play a decisive role on the battlefield. This challenged the older idea that heavily armored noble cavalry were always dominant. The longbow was not a new invention, but it became central to English military practice, especially in the famous victories of Crécy, Poitiers, and Agincourt.
Gunpowder also began to alter warfare. Early cannons were unreliable and difficult to use, but their effect on castles and fortified walls was significant. As French artillery improved in the later stages of the war, sieges could be shortened and older fortifications became less secure. This change helped centralizing monarchies strip power from local lords who had once relied on strong castles as symbols of independent power.
Professionalization of warfare meant that kings needed steady revenue. Instead of relying primarily on feudal dues, they developed systems of taxation to pay troops, build and maintain fleets, and produce or buy weapons. This strengthened central governments but also imposed new burdens on populations, linking warfare to broader changes in state formation.
In summary, the Hundred Years' War marked a transition from a world in which feudal knights defined military power to one where disciplined infantry, archers, and gunners, backed by royal taxation, became the core of armies.
End of the Conflict and Legacy
The war gradually drew to a close rather than ending in a single decisive event. By the mid fifteenth century, French forces had retaken key territories, pushed back English garrisons, and reduced English power on the continent to the coastal enclave of Calais. Many factors contributed to this outcome, including stronger French royal leadership, better use of artillery, internal troubles in England, and the exhaustion of both societies.
In 1453, the French captured Bordeaux, bringing English rule in Gascony to an end. Historians often use this date as the conclusion of the Hundred Years' War. Calais remained in English hands for another century, but it no longer represented a broad continental principality, only a single fortified port.
The legacy of the war was far reaching. In France, it helped create a more unified kingdom with a stronger monarchy and a clearer sense of territorial identity. In England, it contributed to later political crises and a turn away from major continental ambitions for a time. In both realms, it influenced language, propaganda, and perceptions of neighbor and enemy, leaving stories and memories that shaped later national histories.
The conflict also stands as a marker of transition in European history. It bridged the medieval and early modern worlds, coinciding with other late medieval crises such as the Black Death and internal church divisions. Together, these experiences weakened old structures and opened the way for new political, military, and social arrangements that would define later centuries.