William Marshal had been born during the Civil Wars of King Stephen and Empress Mathilda. He trained and knighted one intended king; served faithfully Kings Henry II, Richard the Lionheart, and John Lackland; and knighted and served as regent for a fourth king. As "rector regis et regni," Marshal had the Great Charter reissued in 1216 and in 1217 for the welfare and future of England and the Crown. There are many explanations and definitions of Marshal, his life and his time. Some say he survived so long and so well because of his physical stamina and condition, that he was simply a man of great physical strength. This gives only a piece of the complete portrait of William Marshal. He was a brilliant strategist in terms of his world, militarily and politically. He lived and survived in Henry II's arena, earning Henry's respect and affection. No man of little intelligence would have survived very long there. William Marshal can be understood in terms of his world of feudalism, fealty, loyalty and honour. Marshal stood by King John because of Marshal's oath of fealty and homage to his "lord," who also happened to be the King. William Marshal was a man who lived his life according to his sense of honour, and his sense of honour was defined in the laws and customs of feudalism and knighthood. It is that sense of honour that made no man equal to William Marshal, knight, Earl of Pembroke and Striguil, Lord of Leinster, and Regent of England.