14 May 1219 the greatest knight that ever lived died.

William the Marshal.

Marshal grew up in both England and France, where his family held land. Knighted in 1166, he attended his first tournament a year later, shortly afterwards joining the service of Eleanor of Aquitaine.

He is known to have bested 500 men over the course of his tournament career, and at the battle of Lincoln in 1217 at the age of 70, he led the English army to victory.

https://www.historic-uk.com/HistoryUK/HistoryofEngland/William-Marshal-Knights-Tale/

http://www.medievalwarfare.info/marshal.htm