 Marshal's eldest son, William Marshal (died 1231), 2nd Earl of Pembroke of this line, passed some years in warfare in Wales and Ireland, where he was justiciar from 1224 to 1226; he also served Henry III in France.His second wife was the King's sister, Eleanor, who later married Simon de Montfort, but he left no children.His brother Richard Marshal (died 1234), 3rd Earl, came to the fore as the leader of the baronial party, and chief antagonist of the foreign friends of Henry III.