Siege Warfare during the Hundred Years War

Once More unto the Breach

Peter Hoskins

• Publisher: Pen and Sword Military
• Year: 2018
• ISBN:
  9781526715852
• Topic: History
• Subtopic: Military & Maritime History
• Index: History

Histories of the Hundred Years War have been written, and accounts of the famous battles, but until now no book has concentrated on the sieges that played a decisive role in the protracted struggle between England and France. Edward III's capture of Calais in 1347 was of crucial importance for the English, and the failure of the English siege of Orléans in 1429 was a turning point for the French after the disaster of Agincourt. Throughout the war, sieges were a major weapon in the strategic armories of both sides, and Peter Hoskins's perceptive and graphic study is a fascinating analysis of them.He describes the difficulties faced by besieger and besieged, examines the logistics and resource implications of sieges, and provides a comparative assessment of siege warfare alongside set-piece battles and the English strategy of chevauchées. Key sieges are reconstructed in vivid detail, other sieges are summarized, and the book is fully illustrated with photographs and plans.

Chapter 1

The Hundred Years War

Sieges, like the great battles of the Hundred Years War, mean little out of the context of the broader history of the war, particularly as the strategies adopted by both sides evolved throughout the war. It was only in the nineteenth century that historians coined the term ‘the Hundred Years War’ to cover the conflict between the English and French kings between 1337 and 1453. The name is somewhat misleading since it gives the impression of a period of continual warfare, whereas there were several distinct phases of war interspersed by periods of truce and peace, and the strategies employed varied between these phases. The English strategy in the reign of Edward III from the outbreak of war in 1337 until his death in 1377 was largely one of mobile warfare through mounted raids called chevauchées. There were numerous sieges, most notably those of Tournai in 1340 and Calais in 1346–1347, but overall the objectives of the strategy were to take the war deep into enemy territory and to bring the French to battle if the circumstances were right. This strategy has been described by the historian Clifford J. Rogers as being focused on people rather than places, with a key objective to bring the French to battle in favourable circumstances for the English. Under Henry V, and until the end of the war, the emphasis of English strategy changed. Bringing the French to battle was still an objective, but taking and holding towns to establish English rule took primacy. On the French side, the major successes of Charles V in driving the English out of the territories ceded by the Treaty of Brétigny and by his grandson Charles VII in finally expelling the invaders were largely attributable to the retaking of towns and fortresses and the re-establishment of French rule in lands which had gone over to the English.

Causes of the Hundred Years War

There were two underlying causes of the war which started in 1337: the homage claimed by the French kings from the kings of England for their lands in France, and the English claim to the throne of France.

The anomaly whereby English kings owed homage to the kings of France can be traced back to William the Conqueror, who was both King William I of England and Duke of Normandy. The situation was exacerbated when Henry II came to the throne in 1154. He had acquired extensive lands in south-western France through his marriage to Eleanor of Aquitaine. Thus he, and subsequent English kings, ruled the Duchy of Aquitaine centred on the city of Bordeaux. The status of Aquitaine was a persistent cause of dispute between the kings of England and France, with kings of France demanding homage from the English kings who proclaimed their right to full sovereignty as Dukes of Aquitaine. In the years immediately preceding the Hundred Years War there were protracted diplomatic wrangles between Edward III and Philip VI. Matters came to a head in 1337 with a dispute over the extradition from England of a French exile, Robert of Artois, a one-time adviser to Philip. Edward refused to return Robert to France, and Philip declared Edward’s Duchy of Aquitaine forfeit. With war coming Edward revoked his homage for Aquitaine.

The issue of homage for Aquitaine should have been resolved by the Treaty of Brétigny of 1360 between Edward III and John II of France after the English victory at Poitiers in 1356. Under a protocol associated with the treaty Edward III agreed to renounce his claim to the throne of France in return for French agreement that he should hold Aquitaine in full sovereignty. Unfortunately, King John II died in 1364 before these terms were put into effect, and the issue remained in the forefront of the quarrel between England and France. In 1369 Charles V reclaimed sovereignty over Aquitaine and Edward III took up the title of King of France once more. In 1399, on his father’s accession as Henry IV, the thirteen-year-old future Henry V was named Duke of Aquitaine, but the dispute over sovereignty came into sharp focus again in early 1401 when the French king, as a deliberate slight to Henry IV, named the Dauphin Louis, his eldest son and hence heir to the throne, Duke of Guienne (the French name for Aquitaine). The importance of resolving the dispute over sovereignty for Aquitaine was not lost on the young Henry, and it was a central tenet of his policy towards France after his accession as King Henry V in 1413.

The second cause of the war was the claim of English kings to the crown of France. On the death of the French King Charles IV in 1328 the closest male successor was Edward III of England through his mother Isabella, sister to Charles IV and daughter of Philip IV.

The crux of the matter was whether the crown could be passed through the female line. The French view was that a woman could not inherit the crown and that she could not, therefore, pass this right to her son. Thus, Philip, the next closest male successor, who could trace his lineage back to Philip III through an unbroken male line, assumed the title King Philip VI – the first of the Valois dynasty. There was a somewhat desultory attempt by the English to lay claim to the throne on behalf of the fifteen-year-old Edward III. This received short shrift in France, and there the matter lay until the third year of the war in 1340 when Edward formally laid claim to the crown of France.

It is not clear whether or not Edward held this claim as a serious war aim. Since, in the Treaty of Brétigny, he was prepared to trade the claim to the throne for sovereignty over Aquitaine it may have been simply a way of encouraging allies and exerting negotiating pressure on Philip VI and his successor John II. With the failure to implement the treaty the issue remained unresolved throughout the rest of Edward III’s life and the remainder of the war.

The Outbreak of War and the English Ascendancy, 1337–1360

First Moves

In May 1337 Philip VI’s decision that the Duchy of Aquitaine should be forfeit due to Edward III’s refusal to deliver Robert of Artois into the hands of the French led to Edward’s revocation of homage. Philip had already proclaimed the arrière-ban to summons a royal army. The war which was to span the reigns of five French and five English kings and known to us now as the Hundred Years War had been unleashed.

At the start of the war both kings expected that Aquitaine and the southwest of France would be the principal theatre of operations. Indeed, in the first years of the war there were some French incursions into Aquitaine, where a small number of English reinforcements had been despatched. Also there was some cross-channel raiding by both sides, but as events unfolded it became apparent to the English and the French that the main focus would be to the north and neither king went to the south-west.

In the north attention turned to the Low Countries where there was widespread dissatisfaction with relationships with France. Edward III sought to exploit Philip’s difficulties by forging an alliance with Louis of Bavaria, the Emperor of the Holy Roman Empire, and with the discontented lords in the Low Countries. Edward landed at Antwerp in July 1338 and made his way to Coblenz. Here he was appointed the Emperor’s vicar, effectively vice-regent, in Western Europe for seven years and the Emperor’s nobles gave Edward their homage. Edward summoned the nobles of the region to join his army in July 1339 with the objective of recovering the area around Cambrai from the French and restoring it to the Empire.

Edward’s allies failed to arrive on time, and it was not until September that his army gathered. After a desultory attempt to take Cambrai by siege, the army moved into France and spread destruction in the hope of provoking Philip into coming to battle. By mid-October the allied lords were becoming restless and they were on the point of dispersing to return home when the prospect of battle persuaded them to stay. The French and English armies gathered near the town of La Capelle, with Edward in a strong defensive position. In the event, the French melted away and Edward’s allies departed for home.

So far Flanders had remained neutral as the count had maintained a difficult balance between loyalty to the King of France and widespread internal opposition to his policy. However, Jacob van Artevelde, a powerful merchant from Ghent, had lent money to Edward and in return had secured the removal of restrictions on the import of English wool which was so important to Flanders. By late 1339 Artevelde had become de facto ruler of Flanders and the count had fled to France. A problem for Edward and Artevelde was that if the Flemish fought for Edward they would be in breach of their allegiance to their overlord, the King of France. The way around this problem was for Flanders to recognize Edward as King of France, and in Ghent in January 1340 Edward formally proclaimed his claim to the French crown.

English Successes in Flanders and Brittany – the Treaty of Malestroit Edward returned to England to raise further subsidies, having expended huge sums during 1339 to pay and encourage his allies. In late June 1340 he set sail once again for Flanders. This was, on the face of it, a risky expedition. The French had had the upper hand at sea so far in the war, and a large fleet, including galleys furnished and crewed by the Genoese, had been assembled at Sluys in anticipation of Edward’s return. Naval battles of the period were little different from combat ashore, with men boarding enemy ships to engage in hand-to-hand fighting. As on land, archers provided the English with a powerful weapon. The French chose to remain in harbour with their ships chained together to await the English. In doing so they sacrificed their ability to manoeuvre while Edward’s ships were free to do so and optimize the use of their archers. The result was a crushing English victory in the first large-scale encounter of the war.

The success at Sluys brought in its train a treaty for Edward with Flanders, Hainault and Brabant. The main objective for the coming campaign was to be Tournai, with the goal of bringing King Philip to battle. The town was duly besieged while Philip watched events from a distance. He failed to come to the relief of the town and after six weeks it seemed close to surrender. However, Edward was faced with problems holding his allies together and he had little option but to agree to a one-year truce, the Truce of Esplechin, to run from September 1340. Early the next year Edward’s appointment as the Emperor’s vicar was withdrawn. The alliance collapsed, bringing to a close two years of war with little to show for the huge sums dispensed by the English exchequer.

In April 1341 the death of John III, Duke of Brittany, led to a disputed succession for the dukedom between John de Montfort and Charles de Blois. Initially, the struggle was a side-show but in early 1342 Edward III acceded to a request for help from Joan of Flanders on behalf of her husband John de Montfort, who was languishing in prison in Paris. An English force duly arrived in Brittany in May 1341, relieving the siege of Hennebout where Joan was holed up. A further English force, under the command of the Earl of Northampton who had been appointed Edward’s lieutenant in Brittany, arrived in Brest in July. Northampton advanced to Morlaix and after an unsuccessful assault settled down to besiege the town. Charles de Blois came to its relief in late September, and in the first major land engagement of the war the Earl of Northampton drove off the relieving force. More English troops were to follow, with Edward arriving at Brest in person at the end of October 1342. The threat to the French was now such that it drew in both King Philip and his eldest son the Duke of Normandy, the future King John II. It looked in January 1343 as though there would be a set-piece battle between the French and the English, but once again this was not to be. Later that month the intervention of ambassadors of Pope Clement VI secured the Truce of Malestroit. The truce, which permitted the English and de Montfort’s supporters to keep their gains, was intended to last for three years until September 1346.

A Return to War

In the next two years there were frequent outbreaks of fighting and finally in June 1345 Edward renounced the truce. With the resumption of war Edward conceived a three-pronged attack on France: the Earl of Northampton from Brittany, the Earl of Derby in the south-west and the king from Flanders. Edward crossed to Flanders, but here his plans came to nothing following the assassination of Artevelde during a riot in Ghent in July 1345. However, that month the Earl of Northampton, accompanied by John de Montfort who had escaped from France the month before, returned to Brittany. The fighting continued through the winter and into 1346 with the English taking a number of towns, and in June 1346 Sir John Dagworth won a remarkable victory against superior numbers at St-Polde-Léon. Derby should have left for France at about the same time as Northampton left for Brittany but was delayed by the vagaries of weather in the Channel. He landed in Bordeaux on 9 August 1345 and embarked on an aggressive campaign from the outset, capturing a number of key towns, including Bergerac on the Dordogne, and La Réole and Aiguillon on the Garonne. In October 1345 he also defeated a substantially larger French army at Auberoche. Derby’s success drew south the Duke of Normandy, who elected to attempt to retake Aiguillon and settled down to besiege the town in April 1346. The landing of Edward III in Normandy in July left Philip in a difficult position. John, Duke of Normandy, was in the south-west with a substantial force facing a relatively minor threat while the major challenge to the French developed in the north. The Duke of Normandy was recalled, but he was anxious to complete the siege of Aiguillon before he departed. In the event he left for the north without taking the town, but he did not leave until 20 August, too late to be able to join his father’s army at the Battle of Crécy.

The Crécy Campaign

While Northampton and Derby continued with their operations during 1346, Edward revised his plans. Two further armies were now envisaged, one to be led by Edward III and a further army drawn from his Flemish allies and led by Sir Hugh Hastings. The destination of Edward’s army was announced as Gascony, with the assumed aim being to assist in raising the siege of Aiguillon. However, this was disinformation intended to confuse the French, and once the army was at sea the true destination was revealed as Normandy. Godefroy d’Harcourt, a disaffected Norman noble in Edward’s service, may have proposed the landing in his ancestral lands of the Cotentin peninsula, but another factor may have been the historical link between England and the duchy through its possession by English kings in the twelfth century. Whatever the reason, Edward’s fleet made landfall off St-Vaast on 12 July 1346. Edward’s subsequent march through France culminated in the Battle of Crécy, fought a little over six weeks later on 26 August 1346.

From Crécy to Brétigny

In the aftermath of Crécy Derby kept the pressure on the French in the south-west and in September and October 1346 struck north as far as Poitiers, but the main theatre of operations remained the north. From Crécy-en-Ponthieu Edward III moved north with the objective of laying siege to Calais. On 4 September the first English troops approached the town. Over the next months considerable resources and determination were required to bring the siege to a successful conclusion. Late in July 1347 Philip approached with a large army to relieve the town, and issued a challenge to Edward. The English accepted the challenge but as so often in earlier years the French army faded away. The last hope for the garrison and the inhabitants had gone and the town surrendered. It was to remain an English town for more than 200 years until its surrender to the French in 1558 in the reign of Queen Mary.

In September 1347 a truce was agreed, initially until June of the following year. Although there was sporadic fighting in Brittany, the Calais Pale and Gascony during the formal respite in hostilities, the truce was extended several times until it finally collapsed in 1355. The focus now turned to Gascony, where the King of France’s lieutenant, Jean I, Count of Armagnac, was making worrying incursions into English Aquitaine. Edward III despatched his eldest son Edward of Woodstock, the Black Prince, to Bordeaux, and between October and December 1355 he swept across the Languedoc as far as the Mediterranean before returning to Bordeaux. The following year he moved north and at the Battle of Poitiers in September 1356 won another great victory over the French. Poitiers was arguably the closest that the English came to winning a decisive battle during the Hundred Years War, with the King of France, since 1350 John II, captured and France thrown into chaos. John was taken to England in May 1357 and negotiations began to secure a lasting peace. It required a further English invasion, led once again by Edward III, in 1359 and 1360, marked by the unsuccessful siege of Reims, to finally compel the French to agree terms, enshrined in the Treaty of Brétigny which was ratified in Calais in October 1360.

The Peace of Brétigny

Under the Treaty of Brétigny, in addition to Edward and John trading sovereignty over Aquitaine for the English claim to the French crown, huge tracts of south-western France were ceded to Edward. Thus, the first phase of war left the English under Edward III in the ascendancy, but, due to the failure to implement all of its provisions, the Treaty of Brétigny, instead of providing the opportunity for a lasting peace, sowed the seeds for a renewal of war. On John’s death in 1364 a substantial part of his ransom, agreed as part of the treaty, remained unpaid. The outstanding sum was to remain an issue between England and France, and its settlement was an objective in Henry V’s negotiations with the French fifty years later.

The French Recovery, 1369–1389

Charles V succeeded John II in 1364. He had been a party to the Treaty of Brétigny. However, since the joint renunciations of sovereignty (over Aquitaine by John and by Edward of his claim to the French crown) had not been ratified he refused to be bound by them. From Charles’ accession there was a steady deterioration in relations between France and England, and in 1367, at Nájera in Spain, an Anglo-Gascon army led by the Black Prince in support of Pedro the Cruel’s claim to the throne of Castile defeated the other claimant, Henry of Trastámara and his Franco-Castilian army. Pedro reneged on his commitment to fund this campaign and the Black Prince, who since 1363 had been Prince of Aquitaine, had to resort to increased taxation on his subjects in Aquitaine. This resulted in considerable discontent, and in 1368 the Count of Armagnac, whose lands were within the newly expanded Aquitaine, appealed a dispute with the Black Prince to King Charles V. Charles was aware that hearing the appeal amounted to a rejection of English claims to sovereignty over Aquitaine, but nevertheless he issued a summons for the prince to appear in Paris in 1369. The prince failed to attend and the war was renewed.

Charles V was too astute to repeat the experiences of his grandfather and father at the battles of Crécy and Poitiers, and he generally avoided large-scale set-piece battles. His strategy was to harass English armies and gradually push back the boundaries of English-held territory by retaking towns and castles. He was aided by a shrewd and effective commander, Bertrand du Guesclin, Constable of France, and by the time of Charles V’s death in 1380 the English possessions had been reduced to the Calais Pale and a coastal strip near Bordeaux.

An Uneasy Truce, 1389–1415

The war continued, with neither side making significant advances, until the Truce of Leulinghem in 1389. Negotiations to find a permanent peace dragged on but without success. In 1396, to forestal...

Table of contents

• Cover
• Title
• Copyright
• Dedication
• Contents
• List of Maps and Plans
• List of Plates
• Acknowledgements
• Preface
• Glossary
• 1. The Hundred Years War
• 2. Siege Warfare
• 3. Fortifications – Attack and Defence
• 4. The English Ascendancy, 1337–1360
• 5. The French Recovery, 1369–1389
• 6. From Harfleur to the Death of Henry V, 1415–1422
• 7. From the Death of Henry V to the Siege of Orléans, 1422–1429
• 8. From Orléans to the Truce of Tours, 1429–1444
• 9. The Expulsion of the English from France, 1449–1453
• Conclusion
• Appendix I: Summary of Outcomes of Sieges
• Appendix II: Duration of Sieges
• Notes
• Bibliography
• Plate section