 Complete the following phrase:  In August 1189, at the age of 43, William Marshal, held by many to be the greatest knight in Christendom, was given the hand of Isabel de Clare, and, in 1199, was created the 1st Earl of Pembroke by King John. Although he had previously served Richards father, Henry II, against Richards rebellions, Richard confirmed the old Kings licence for his marriage with the heiress of Strigul and Pembroke. He served Richard and John loyally, defending the latter against the French and English rebel barons in the 