King John of England was the son of Henry II and Eleanor of Aquitaine. After his brother's King Richard I's death in 1199, he became King of England.

After the treaty of Le Goulet, in a move which Roger de Lascy found incomprehensible, John gave Philip Augustus the Vexin and 20000 marks relief.

While Château Gaillard was besieged, he sent his forces against Philip's troops but they failed to remove them. Later he devised a plan for a relief effort to the castle which also failed. He wrote a letter to de Lascy about a new relief effort, and ordered him to hid all valuable items in a hidden chamber and destroy the key.

He died in 1216.

His concessions to Philip Augustus of France earned him the nickname "Lackland".