A treaty with the English which secured the district of Agenais for France was followed by a feudal war in Guienne.
AGENAIS, or Agenois, a former province of France.
Having in general shared the fortunes of Aquitaine during the Merovingian and Carolingian periods, Agenais next became an hereditary countship in the part of the country now called Gascony (Vasconia).
The marriage of Eleanor of Aquitaine with Henry Plantagenet in 1152 brought it under the sway of England; but when Richard Cceur-de-Lion married his sister Joan to Raymund VI., count of Toulouse, in 1196, Agenais formed part of the princess's dowry; and with the other estates of the last independent count of Toulouse it lapsed to the crown of France in 1271.
During the wars between the English and the French in the 14th and 15th centuries, Agenais was frequently taken and retaken, the final retreat of the English in 1453 at last leaving the king of France in peaceable possession.
Thenceforth Agenais was no more than an administrative term.
The title of count of Agenais, which the kings of England had allowed to fall into desuetude, was revived by the kings of France, and in 1789 was held by the family of the dukes of Richelieu.
There is no good history of Agenais; that published by Jules Andrieu in 1893 (Histoire de l'Agenais, 2 vols.) being quite inadequate.
Agenais and southern Saintonge, which fell to the Crown by the death of Alfonse of Poitiers in 1276, as part of his vast possessions in Aquitaine and Languedoc, were ceded to Edward I.
Louis began his rebellious career by a futile attempt to seduce the cities of Agenais into treason, and then he prepared a plot to seize the king and his minister Pierre de Breze.
The house of Lasseran-Mansencomme, which possessed the estate of Monluc in Agenais, and took its name in the 16th century, is held to be a branch of the family of Montesquiou.
In the south this campaign marked real progress, not mere objectless plunder, for it was followed by the reconquest of great districts in Prigord and the Agenais, which had been lost to England since the r3th century.
Treaty of King John ceded Poitou, Saintonge, Agenais, Prigord Br~tigny.
The preachers Raoul Ardent in 1101 and Robert of Arbrissel in 1114 were summoned to the districts of the Agenais and the Toulousain to combat the heretical propaganda.