By his marriage (1254) to Eleanor of Castile Edward gained new claims in France and strengthened the English rights to Gascony. He received from his father the huge appanage of all outlying English dependencies, including Wales, Ireland, and the lands in France. After a brief alliance with Simon de Montfort, earl of Leicester, Edward supported his father in the Barons' War (1263–67) and, by revitalizing the royal party and its forces, was responsible for the crown's triumph. From this time on the young heir was the real ruler of the realm. He joined (1270) the Ninth Crusade and was on his return journey when he learned of his father's death. He did not reach England until 1274, when he was crowned.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.