Caroline Phase of the Hundred Years' War (1369-1389)(1389)
1369 - 1389
Kingdom of England and Allies
Commander: Edward the Black Prince, John of Gaunt, Edward III
Initial Combat Strength
%34
ⓘ Analysis Parameter: Raw combat force projection only. Does not reflect the mathematical average of operational quality scores.
Decisive Force Multiplier: The English longbow and chevauchée tactics provided initial advantages but were neutralized by financial strain and plague.
Kingdom of France and Castilian Allies
Commander: Charles V, Bertrand du Guesclin, Henry II
Initial Combat Strength
%66
ⓘ Analysis Parameter: Raw combat force projection only. Does not reflect the mathematical average of operational quality scores.
Decisive Force Multiplier: France's resource superiority, Castilian naval support, and du Guesclin's attrition strategy decided the conflict.
Final Force Projection
Post-battle strength after attrition and strategic wear
Operational Capacity Matrix
5 Military Metrics — Staff Scoring System
France's larger population and tax base, combined with Castilian naval support that disrupted English supply lines, gave it a decisive logistical edge. England struggled to finance the war due to the economic impact of the Black Death and declining tax revenues from Aquitaine.
The harmonious command relationship between Charles V and Du Guesclin ensured strategic coherence, whereas England suffered from Edward III's senility, the Black Prince's illness, and the death of John Chandos, creating a leadership vacuum and poor coordination.
France exploited the defensive advantage by avoiding pitched battles and forcing the English into protracted chevauchées, stretching their supply lines and wearing them down through ambushes and attrition on hostile terrain.
France, through commanders like Du Guesclin and Clisson, closely tracked English movements using spies and local support, gaining superior intelligence. The English failed to anticipate French strategy and were repeatedly caught off guard.
While English longbows and chevauchée tactics were initially potent, the French strategy of withdrawing into fortified towns neutralized them. The Castilian navy provided France with a decisive force multiplier by dominating the seas.
Strategic Gains & Victory Analysis
Long-term strategic gains assessment after battle
Victor's Strategic Gains
- ›France regained most of the territories lost at Brétigny, reestablishing its dominance on the continent.
- ›Castilian naval superiority in the Channel severed English supply lines and enabled raids on the English coast.
Defeated Party's Losses
- ›England lost all French possessions except Calais, forcing a strategic withdrawal.
- ›The English economy was severely strained by war costs and the Black Death, leading to increased domestic opposition.
Tactical Inventory & War Weapons
Critical weapons systems and combat vehicles engaged in battle
Kingdom of England and Allies
- English Longbow
- Chevauchée Tactics
- Armored Knight
- Cog Ship
Kingdom of France and Castilian Allies
- French Castle Network
- Castilian Galley
- Bertrand du Guesclin's Guerrilla Tactics
- Fortified Cities
Losses & Casualty Report
Confirmed and estimated casualties sustained by both parties as a result of battle
Kingdom of England and Allies
- 10,000+ SoldiersEstimated
- 300+ ShipsConfirmed
- All Castles in AquitaineConfirmed
- All French Territories Except CalaisConfirmed
Kingdom of France and Castilian Allies
- 8,000+ SoldiersEstimated
- 150+ ShipsEstimated
- Some Rural Areas PlunderedIntelligence Report
- Plague CasualtiesUnverified
Asian Art of War
Victory Without Fighting · Intelligence Asymmetry · Heaven and Earth
Victory Without Fighting
France won diplomatically by securing Castile as an ally and using Gascon grievances to legitimize its sovereignty over Aquitaine. England failed to gain allies and derived no benefit from its intervention in Castile.
Intelligence Asymmetry
France exploited dissatisfaction with English rule in Aquitaine to gather intelligence from locals. England failed to monitor developments in the French court and could not foresee Charles V's strategic preparations.
Heaven and Earth
France used its geographical depth and network of fortified towns to attrit English raids. The Black Death outbreaks between 1369 and 1375 affected both armies but hit England's economy harder. Wind and tide conditions favored the Castilians at the Battle of La Rochelle.
Western War Doctrines
War of Attrition
Maneuver & Interior Lines
France used interior lines to rapidly shift forces to threatened areas. English long-distance chevauchées were slowed by heavy baggage, losing maneuverability. Du Guesclin's small-unit raids constantly harassed the English.
Psychological Warfare & Morale
The French populace was motivated by Charles V's just rule and the promise of expelling the English. In the English army, prolonged failed campaigns, unpaid wages, and disease caused a collapse in morale. John of Gaunt's failures strengthened anti-war opposition in England.
Firepower & Shock Effect
At La Rochelle, the Castilian fleet's destruction of the English squadron shattered English naval shock dominance. On land, the English longbow failed to achieve a decisive shock effect because the French avoided pitched battles.
Adaptive Staff Rationalism
Center of Gravity · Intelligence · Dynamism
Center of Gravity
France correctly identified the English center of gravity as their logistical base in Aquitaine; the fall of La Rochelle broke the back of English resistance. England aimed at France's economic heartland but was thwarted by Charles V's defensive strategy.
Deception & Intelligence
France used legal proceedings to corner England diplomatically and legitimize the war. Militarily, Du Guesclin deceived the English with feints and sudden raids. English attempts at deception were limited.
Asymmetric Flexibility
France adopted a dynamic maneuver defense instead of static trench warfare, rapidly adapting to changing conditions. England rigidly adhered to the chevauchée doctrine, failing to see its diminishing returns.
Section I
Staff Analysis
The Caroline Phase was a war of attrition initiated by France to reverse the territorial losses of the Treaty of Brétigny. England suffered from command weaknesses due to the Black Prince's illness and Edward III's old age, while France leveraged the skilled Bertrand du Guesclin. English chevauchée raids aimed to destroy the French economy, but Charles V's strategy of avoiding pitched battles and the Castilian fleet's destruction of an English supply convoy at La Rochelle marked the turning point. France's superior resources and manpower allowed it to recapture castles piecemeal, ultimately expelling the English from the continent.
Section II
Strategic Critique
The English high command exhausted financial resources through the Black Prince's intervention in the Castilian Civil War, and his tax policy in Aquitaine triggered a Gascon revolt, inviting French intervention. Charles V, on Du Guesclin's counsel, patiently pursued an attritional strategy minimizing risks. The defeat at La Rochelle crippled English logistics, while John of Gaunt's 1373 Chevauchée was a strategic failure. France's alliance with Castile provided naval superiority that decided the conflict.
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