William Marshall was a prominent English knight and nobleman in the 12th century, known for his exceptional military skills and loyalty. He served under several kings, including King Henry II and King Richard I, and played a significant role in the Crusades. His reputation as a brave and honorable warrior earned him the title of the "greatest knight." In addition to his military achievements, William Marshall was also a skilled diplomat and statesman. He held various titles, including Earl of Pembroke, and was instrumental in the political landscape of medieval England. His legacy is celebrated in literature, particularly in the biography written by John of Salisbury.