Louis VII: Crusade, Lost Aquitaine, and the Plantagenet Challenge (1137–1180) · HIGH MIDDLE AGES
In 1152, the marriage of Louis VII with Eleanor of Aquitaine was annulled. The event was not merely private: it transformed the balance of the West, for it touched on the control of immense territories.
Aquitaine was not an ordinary province: it was a rich and prestigious ensemble. As long as Eleanor was queen, Louis benefited from extended influence. The rupture signified a major political loss.
Eleanor married Henry II. The alliance linked Aquitaine to Anglo-Norman power. The King of France found himself facing a rival whose territorial base and resources were considerable.
This shift opened the long phase of the reign: a struggle made of diplomacy, alliances, and indirect conflicts against what became the Plantagenet Empire.