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Isabel brought to Marshal the palatine lordships of Pembroke and Striguil in Wales and the lordship of Leinster in Ireland.
WilliamMarshal was the epitome of knighthood and chivalry.
WilliamMarshal was the main force and impetus for the defeat of Philip II of France, even leading the attack to relieve Lincoln castle in May 1217 though he was seventy years old.