Hundred Years' War: Lancastrian Phase (1415–1453)(1453)
13 August 1415 - 17 July 1453
Kingdom of England (House of Plantagenet/Lancaster)
Commander: King Henry V, then John, Duke of Bedford
Initial Combat Strength
%62
ⓘ Analysis Parameter: Raw combat force projection only. Does not reflect the mathematical average of operational quality scores.
Decisive Force Multiplier: Longbow technology; combined arms tactics (mounted archers, heavy cavalry); charismatic leadership of Henry V.
Kingdom of France (House of Valois)
Commander: King Charles VI, later Charles VII and Joan of Arc
Initial Combat Strength
%38
ⓘ Analysis Parameter: Raw combat force projection only. Does not reflect the mathematical average of operational quality scores.
Decisive Force Multiplier: Artillery use (especially at Castillon); moral impact of Joan of Arc; unity gained by overcoming internal divisions.
Final Force Projection
Post-battle strength after attrition and strategic wear
Operational Capacity Matrix
5 Military Metrics — Staff Scoring System
France had greater logistical depth due to its larger population and rich agricultural lands; however, civil war (Armagnac-Burgundian) initially disrupted supply lines. England struggled to finance prolonged overseas operations with limited resources, sustaining itself initially through plunder and taxation, but lost logistical advantage as territory shrank. The French ensured continuity of supply through artillery and a professional army.
The English command echelon, especially Henry V and Bedford, showed disciplined and centralized control with tactical flexibility and trust in subordinate commanders. The French side suffered from feudal dispersal, political intrigues, and Charles VI's mental illness, weakening the chain of command; but professionalization under Charles VII brought recovery, and late-war French artillery coordination surpassed the English.
France enjoyed defensive depth with its vast geography and network of castles; the English were forced to operate in narrow corridors from coastal bridgeheads. While the English initially gained surprise through rapid campaigns (Agincourt), the French eventually seized the initiative with artillery sieges. At Castillon, the French use of field fortifications and artillery deployment was decisive in time-space utilization.
Both sides exploited each other's internal divisions for intelligence; the English allied with the Duchy of Burgundy to gain insight into the French court. However, after Joan of Arc, French popular support and spy networks improved anticipation of English movements. Before Castillon, the English failed to adequately reconnoiter French artillery positions, revealing an intelligence gap.
The English longbow, disciplined archer units, and mounted infantry tactics created shock effects in pitched battles like Agincourt; Henry V's charisma boosted morale. The French gained a morale multiplier through Joan of Arc's spiritual leadership and later a technological edge with innovative field artillery. Burgundy's change of allegiance was also a significant force multiplier for the French.
Strategic Gains & Victory Analysis
Long-term strategic gains assessment after battle
Victor's Strategic Gains
- ›England, under Henry V, captured extensive territories in Normandy and northern France, securing legal standing for its claim to the French throne.
- ›The Treaty of Troyes made Henry V regent and heir to France, extending English influence to Paris.
Defeated Party's Losses
- ›France recovered through national resistance inspired by Joan of Arc; artillery and professional army reforms gradually pushed the English back.
- ›The French recaptured Gascony at the Battle of Castillon, leaving only Calais to the English; the Hundred Years' War effectively ended.
Tactical Inventory & War Weapons
Critical weapons systems and combat vehicles engaged in battle
Kingdom of England (House of Plantagenet/Lancaster)
- Longbow
- Mounted Archer (Hobilars)
- Heavy Cavalry
- War Horse Transport Ship
- Siege Towers
Kingdom of France (House of Valois)
- Field Artillery (Couillard)
- Heavy Cavalry (Gendarme)
- Crossbow
- Fortress Cannons
- Handgonne
Losses & Casualty Report
Confirmed and estimated casualties sustained by both parties as a result of battle
Kingdom of England (House of Plantagenet/Lancaster)
- 30,000+ PersonnelEstimated
- 120+ WarshipsIntelligence Report
- 18x Large Siege EnginesConfirmed
- 200+ Tons Ammunition and SuppliesClaimed
- 4x Command CentersConfirmed
Kingdom of France (House of Valois)
- 45,000+ PersonnelEstimated
- 80+ Fortresses and FortificationsConfirmed
- 300+ Noble KnightsUnverified
- 150+ Tons Grain ReservesIntelligence Report
- 9x Command CentersEstimated
Asian Art of War
Victory Without Fighting · Intelligence Asymmetry · Heaven and Earth
Victory Without Fighting
England succeeded in weakening the enemy without battle by allying with Burgundy and fueling the French civil war; however, this was temporary. France ultimately applied 'victory without fighting' more effectively by diplomatically isolating England through the Treaty of Arras (1435), which brought Burgundy back to its side. Long-term, French diplomacy and reconciliation strategy detached English allies.
Intelligence Asymmetry
The English initially analyzed French court divisions and enemy weaknesses well; Henry V's campaign planning relied on this intelligence. Over time, however, the French gained intelligence superiority through local support and guides on their own terrain. Even Joan of Arc's claim of 'divine messages' acted as a form of intelligence advantage, boosting French morale while unsettling the English.
Heaven and Earth
At Agincourt, heavy rain bogged down the heavily armored French cavalry in mud, greatly benefiting English archers. Generally, France's river networks and forested terrain favored defense, while the English depended on coastal bases for logistics. At Castillon, the French used high ground to establish fortified artillery positions, leveraging terrain to their advantage.
Western War Doctrines
Challenge and Siege
Maneuver & Interior Lines
The English demonstrated rapid maneuver capability at the start of campaigns through disciplined marching order and mounted troops; however, their supply lines became dangerously extended as they penetrated deeper into France. The French successfully used interior lines to shift forces to threatened areas. Late-war mobility of French artillery units accelerated siege operations.
Psychological Warfare & Morale
Henry V's victory at Agincourt instilled an 'invincibility' psychology in the English army, but this morale eroded after Bedford's death and growing French resistance. In contrast, Joan of Arc's emergence infused the French with a sense of divine legitimacy and belief in victory, reversing the 'friction' against the English. The coronation of Charles VII cemented a lasting morale advantage through national unity.
Firepower & Shock Effect
English longbows created physical and psychological shock by decimating the enemy at range in battles like Agincourt and Verneuil, reinforced by mounted archers. The French, in the war's final stage, innovatively used field artillery to shatter English lines; at Castillon, artillery fire completely halted the English advance. Both sides attempted to synchronize shock weapons with maneuver, but the French gained a long-term edge through technological innovation.
Adaptive Staff Rationalism
Center of Gravity · Intelligence · Dynamism
Center of Gravity
The English defined their Schwerpunkt as destroying the main enemy army in field battle and gaining influence over political centers (Paris, Reims); however, this focus dissipated as French resistance adopted guerrilla-like tactics. The French centered their resistance on the Bourges and Loire line, concentrating artillery and professional army there to gradually push the English back. Burgundy's defection allowed the French to shift their Schwerpunkt to the northeast.
Deception & Intelligence
The English employed strategic deception by fueling the French civil war and drawing Burgundy to their side, dividing the enemy through diplomatic maneuvers. The French used psychological deception through Joan of Arc's 'holy mission' propaganda and may have used tactical ruses like camouflage or feigned retreats at Castillon. Overall, both sides used intelligence for deception, but French popular support provided more opportunities for ruses.
Asymmetric Flexibility
The English successfully applied their longbow and mounted infantry doctrine, but it rigidified and failed to adapt to the artillery age. The French showed high flexibility by abandoning the feudal cavalry tradition and transitioning to an artillery-centric siege doctrine and standing army. Castillon proved the French had embraced asymmetric innovation by constructing fortified artillery positions in the field.
Section I
Staff Analysis
The Lancastrian Phase was a series of wars in which the English began with clear tactical and operational superiority but ultimately failed due to a lack of strategic depth. Initially, the longbow's firepower and Henry V's exceptional leadership inflicted crushing defeats on France's feudal armies. However, these victories severely strained England's limited demographic and financial resources; holding conquered territories required continuous campaigns and garrisons. On the other hand, after healing the wounds of civil war, France leveraged its numerical superiority, advances in artillery, and moral multipliers like Joan of Arc to launch a gradual counter-offensive. The defection of Burgundy tipped the strategic balance entirely in France's favor. Ultimately, the innovative integration of field artillery with fortified positions at Castillon shattered the English militarily while restoring France's territorial integrity.
Section II
Strategic Critique
The English high command lacked strategic vision after Henry V's death; although the Duke of Bedford was a capable regent, political infighting in England and financial constraints prevented steady reinforcements. The English underestimated the scale of enemy resistance and overextended with limited resources across a vast geography. Conversely, the French staff overcame initial feudal fragmentation to establish a centralized army and regular tax system under Charles VII. Joan of Arc's political and spiritual leadership united military reforms with popular support. The most critical decision point was the French adoption of defensive field fortifications integrated with artillery at Castillon, masterminded by Jean Bureau; this bold move shattered the English assault before it could fully develop and decided the war.
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