King John By justinv8909 Dec 24, 1166 King John's Birth Period: Dec 24, 1166 to Oct 19, 1216 King John's Life Apr 6, 1199 King John becomes King of England Aug 24, 1200 King John Marries Isabella Nov 1, 1209 King John is excommunicated Jan 1, 1215 King John starts the "First Barons' War" Jun 15, 1215 King John Forced to sign Magna Carta Oct 19, 1216 King John's Death King John's Tomb in Worcester Cathedral