Key facts and dates

The Hundred Years War, spanning from 1337 to 1453, began as a prolonged conflict between England and France over territorial claims, feudal disputes, and dynastic ambitions. The early phase (1337-1360) was marked by significant English victories and territorial gains, setting the stage for a long and devastating struggle. The following timeline captures the pivotal moments of this initial period.

Timeline of key events

• 1337 – War begins as Edward III of England asserts his claim to the French throne.
• 1340 – English naval victory at Sluys secures control of the English Channel.
• 1346 – Decisive English triumph at the Battle of Crécy showcases the power of the longbow.
• 1347 – Siege and capture of Calais by English forces, establishing a key foothold in France.
• 1356 – Battle of Poitiers results in the capture of French King John II by the Black Prince.
• 1360 – Treaty of Brétigny cedes significant southwestern French territories to England.

The complex causes of the Hundred Years War

The Hundred Years War, which erupted in 1337, was not a single conflict but a series of wars driven by deep-rooted tensions between England and France. Understanding the origins of this struggle requires examining a web of dynastic, territorial, political, and economic factors that fuelled hostility over generations.

Key causes of the conflict

• Dynastic claims - Edward III of England claimed the French throne through his mother, Isabella, daughter of Philip IV of France. This claim challenged the French succession, particularly after the death of Charles IV in 1328, when the French crown passed to Philip VI under Salic law, which excluded inheritance through the female line.
• Territorial disputes over Gascony - Gascony, an English-held territory in southwestern France, was a source of friction. As Duke of Aquitaine, Edward III owed feudal homage to the French king for this land, leading to disputes over obligations and sovereignty, with France seeking to assert control over the region.
• French support for Scotland - France's alliance with Scotland, England's long-standing enemy, heightened tensions. French military and financial aid to the Scots during their conflicts with England was seen as a direct provocation, intensifying Anglo-French rivalry.
• Economic rivalry in Flanders - Flanders, a vital wool and cloth trade hub, was economically significant to England. However, it was under French influence, and disputes over trade control and political allegiance in the region added an economic dimension to the conflict.
• Personal ambitions - Edward III's desire for prestige and power played a significant role. Asserting his claim to the French throne was not just a legal matter but also a personal mission to enhance his status and that of the English monarchy, fuelling his determination to wage war.

Key events and campaigns in the early phase (1337-1360)

The early phase of the Hundred Years War saw England achieve remarkable successes against France through a series of military campaigns. These victories reshaped territorial control and demonstrated English military prowess, setting the tone for the conflict.

Major campaigns and turning points

• Initial raids and naval victory at Sluys (1340) - Edward III launched early raids into northern France to assert his claim, disrupting French territories. The naval battle at Sluys in 1340 was a significant triumph, as the English fleet destroyed much of the French navy, securing control of the English Channel and enabling safer troop movements.
• Battle of Crécy (1346) - A landmark English victory, Crécy saw Edward III's forces defeat a much larger French army. The effective use of the longbow and defensive tactics decimated French knights, marking a shift in warfare and boosting English morale.
• Siege and fall of Calais (1347) - Following Crécy, Edward III besieged the strategic port of Calais for nearly a year. Its capture provided England with a vital foothold in northern France, facilitating future campaigns and trade.
• Black Prince's campaign and Battle of Poitiers (1356) - Edward, the Black Prince (Edward III's son), led destructive raids known as chevauchées in southern France, weakening French resolve. At Poitiers, his forces defeated the French army and captured King John II, a devastating blow to French prestige and leadership.
• Treaty of Brétigny (1360) - This treaty marked the end of the early phase, with France ceding large parts of southwestern territory, including Gascony and Aquitaine, to England. In return, Edward III renounced his claim to the French throne, though tensions persisted, and the peace was temporary.

English military advantages and tactics

England's successes in the early phase of the war were not merely a matter of luck but the result of superior military strategies and innovations. These advantages allowed smaller English armies to overcome larger French forces repeatedly.

Elements of English military superiority

• The longbow - A powerful weapon with a rapid rate of fire and long range, the longbow enabled English archers to devastate enemy ranks before close combat. Its effectiveness was proven at battles like Crécy and Poitiers.
• Mounted archers - Combining mobility with archery, mounted archers could reposition quickly on the battlefield, striking from advantageous positions and disrupting enemy formations.
• Defensive tactics - English commanders often chose battlegrounds that favoured defence, such as hills or narrow fields, forcing the French to attack uphill or through constrained spaces, as seen at Crécy.
• Combined arms approach - The integration of archers, infantry, and cavalry into cohesive units allowed for flexible responses to French assaults. This coordination contrasted with the French reliance on heavily armoured knights, who were less adaptable.

Impacts of the war on France and England

The early phase of the Hundred Years War had profound consequences for both nations, affecting their economies, societies, and political landscapes. While England celebrated military glory, France bore the brunt of destruction and instability.

Effects on France

• Devastation from chevauchées - English raids, known as chevauchées, deliberately targeted civilian areas, burning crops, villages, and infrastructure to undermine French morale and economy. This left vast regions of France impoverished and depopulated.
• Financial strain - The costs of war, coupled with ransom payments for captured nobles like King John II, drained French resources. Taxes soared, burdening the peasantry and sparking unrest.
• Political instability - The capture of John II and territorial losses weakened the French monarchy, leading to internal power struggles and challenges to royal authority, which further destabilised the kingdom.
• Loss of prestige - Repeated defeats and the loss of key territories damaged France's reputation as a leading European power, eroding confidence in its leadership.

Effects on England

• Military glory - Victories at Crécy and Poitiers, along with territorial gains, bolstered national pride and Edward III's reputation as a warrior king, strengthening the monarchy's domestic support.
• Financial burden - Despite successes, the war was costly. Maintaining armies, funding sieges, and governing new territories strained England's finances, leading to increased taxation and occasional discontent among the populace.

Transformations in military technology and organisation

The Hundred Years War acted as a catalyst for significant changes in how wars were fought, influencing both technology and military structures. The early phase, in particular, highlighted the need for adaptation in response to new challenges.

Key military developments

• Advancements in weaponry - The dominance of the longbow shifted warfare away from reliance on heavily armoured knights towards lighter, more mobile forces. This prompted France to eventually adapt by improving their own archery units and armour.
• Evolution of tactics - Defensive strategies and the use of terrain became central to English success, influencing broader European military thinking. The war demonstrated the effectiveness of disciplined, combined forces over disorganised feudal levies.
• Organisational changes - Both nations moved towards more professional armies. England began relying on contracted soldiers rather than feudal obligations, while France later reformed its military structure to create a standing army, reducing dependence on noble-led forces.
• Siege warfare innovations - The prolonged siege of Calais underscored the importance of logistics and artillery, leading to advancements in siege engines and early gunpowder weapons, which would become more prominent in later phases of the war.