Capetians and Plantagenets: A Long Conflict (12th–13th Century)

Between the twelfth and thirteenth centuries, one of the great political drivers of the kingdom was the confrontation between the Capetians (kings of France) and the Plantagenets (kings of England, dukes in France). England was not merely a foreign rival: its kings were also continental lords, vassals of the king of France for Aquitaine.

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🧩 An “Empire” Too Powerful

In the time of Henry II and his sons, the Plantagenet ensemble controlled Normandy, Anjou and Aquitaine — a power that encircled the Capetian domain. Capetian strategy consisted in exploiting:

• feudal rules (homage, jurisdiction, confiscation);
• internal divisions within the English dynasty;
• coalitions of princes and towns.

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🏰 1204: The Turning Point with Philip Augustus

The confiscation of John Lackland’s fiefs and the conquest of Normandy (1204) opened a new phase: the royal domain grew, England retreated on the continent, and the conflict changed in nature. From then on, it was about:

• holding conquests;
• preventing English reconquest;
• legally locking in the gains.

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🕊️ 1259: Closing Through Diplomacy

Under Louis IX, the conflict flared again (Poitou, Saintonge, 1242) but ended in the long term through a diplomatic agreement: the Treaty of Paris (1259) put an end to major English claims on the territories reconquered by Philip Augustus.

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🧠 Key Points to Remember

• The conflict was simultaneously feudal and international: the same man could be king in England and a vassal in Aquitaine.
• 1204 and then 1259 frame a shift: Capetian conquest, then lasting peace.