Hundred Years' War

Lore & Background

The Hundred Years' War was a series of intermittent conflicts between the kingdoms of England and France, also involving a French civil war, spanning over 116 years. Its appearance in European history is defined by a struggle between two rival dynasties for control of the French throne, which at the time presided over the wealthiest and most populous kingdom in Western Europe. The war’s range extended beyond the two primary kingdoms, drawing in factions from across Western Europe and including dynastically related conflicts in Spain and Belgium, making it the longest military conflict in European history. Its habitat was the late Middle Ages, a period marked by the crisis of the 14th century, including the catastrophic Black Death plague, which caused massive population loss and economic disruption in both France and England. Defining characteristics include the emergence of the conflict from feudal disputes over the Duchy of Aquitaine, triggered by a claim to the French throne by Edward III of England. The war is commonly divided into three phases—the Edwardian, Caroline, and Lancastrian—separated by truces and external interruptions. It spurred innovations in military technology and tactics, such as professional standing armies and artillery, which permanently changed European warfare. Chivalry reached its height during this conflict and subsequently declined. Stronger national identities formed in both kingdoms, which became more centralized and gradually emerged as global powers. The French House of Valois ultimately retained control of the kingdom, and the English and French monarchies remained separate, though English monarchs styled themselves as sovereigns of France until 1802.

Reader's Guide

The Hundred Years' War had a lasting effect on European history. Both sides produced innovations in military technology and tactics, including professional standing armies and artillery, permanently changing European warfare. Chivalry reached its height during the conflict and subsequently declined. Stronger national identities took root in both kingdoms, which became more centralized and gradually emerged as global powers. The war precipitated the creation of the first standing armies in Western Europe since the Western Roman Empire. By the war's end, feudal armies had mainly been replaced by professional troops, and aristocratic dominance yielded to a democratization of manpower and weapons. The economic consequences led to a decline in trade and high taxes, contributing to civil disorder, including the Wars of the Roses in England.

Did You Know?

• The war included related conflicts such as the War of the Breton Succession and the Castilian Civil War.

Roots in Feudal Rivalry and a Broken Succession

The seeds of what would become Europe's longest military conflict were planted centuries before the first arrow was loosed. This tangled web of feudal obligation over territories like the Duchy of Aquitaine created friction for generations. His closest male heir was Edward III of England, whose mother Isabella was Charles's own sister. What followed would span five generations of monarchs and reshape the political map of Western Europe.

Forging a New Kind of War

Across its three great phases — the Edwardian, Caroline, and Lancastrian wars — the conflict served as an unprecedented laboratory for military transformation. But the war's deepest legacy lay in the innovations it forced upon both sides. Professional standing armies and the deployment of artillery emerged as tools that permanently altered how European nations waged war. Simultaneously, the romantic ideal of chivalry reached its zenith on these battlefields before entering a long decline, signaling the end of an era in military culture.

Plague, Poverty, and the Shattering of Order

In France, the plague claimed an estimated six to twelve million lives — a staggering thirty to sixty percent of the total population — triggering catastrophic labour shortages, economic collapse, and deep social dislocation. England, while also struck, suffered roughly two to three million deaths, a severe but comparatively smaller blow. The combined pressures of plague and prolonged warfare generated widespread poverty, major civil unrest, and a significant weakening of royal authority in both kingdoms. England managed to resolve these crises earlier than France, but the scars ran deep. The conflict itself was anything but continuous; it was an intermittent struggle frequently interrupted by truces and external catastrophes like the pandemic. This stop-start nature meant that the war's economic and social devastation compounded over decades rather than arriving in a single catastrophic burst, reshaping the social fabric of Western Europe in ways that outlasted the fighting itself.

Forging Nations from the Ashes of War

Perhaps the most profound and lasting consequence of the Hundred Years' War was not territorial but psychological: the crystallization of national identity in both England and France. Before the conflict, loyalty was often directed toward a lord or a dynasty rather than an abstract nation. The prolonged struggle, fueled by emerging nationalism on both sides, forged a stronger sense of collective belonging that drove both kingdoms toward greater centralization of power. The French monarchy under the House of Valois ultimately retained control of the Kingdom of France, while the English crown, despite losing its continental ambitions, consolidated its position in the British Isles. Both polities gradually emerged as global powers in the centuries that followed. The very name "Hundred Years' War" was coined by later historians, who also folded in dynastically related conflicts in Spain and Belgium, making it the longest military conflict in European history.