 Complete the following phrase:  Johns relationship with his nobles deteriorated further following the kings disastrous campaign to reconquer Normandy and Anjou from France in 1213, with the nobles eager to ally with Prince Llywelyn. Llywelyns aid to Englands nobles, in particular Llywelyns seizure of Shrewsbury in May 1215, was one of the major factors which persuaded John to seal the Magna Carta in June 1215. Llywelyn wrestled significant concessions from the English Crown in the Magna Carta. Land seized unjustly during the conflict would be returned to the other, and the primacy of Welsh law to apply in Pura Wallia two-thirds of the surface area of Wales- particularly with succession to land and title- was reaffirmed, and with Marcher Law to determine rights to land held in the March. The use of the term Marcher Law in the Magna Carta was the first clear reference to the hybrid of Welsh and English law used in the march. The sealing of the Magna Carta did not end the conflict between John and Englands nobles sparking 