He left his first wife
 so he could marry Isabella of Angoulême.
When this man visited Ireland for the first time, he was accompanied by Theobald Walter, who was
 named Butler of Ireland. With the King of France, he signed the Treaty of Le Goulet. He left his first wife
 so he could marry Isabella of Angoulême. His disagreement with the appointment of Stephen Langton led
 Innocent III to excommunicate him. He died in the middle of the First Barons' War, which resulted from
 his refusal to abide by an agreement he had sealed at Runnymede in 1215. For 10 points, name this King of
 England from 1199 to 1216, who was forced to sign the Magna Carta.
When this man visited Ireland for the first time, he was accompanied by Theobald Walter, who was
 named Butler of Ireland.
{John} Lackland