Mercian Peace Accord

The Mercian Peace Accord was a document signed by King Uther Pendragon and Lord Bayard to establish a treaty between the kingdoms of Camelot and Mercia after years of bloody warfare.

Bayard led a delegation of the Mercian court to Camelot to meet with Uther and sign the treaty. The peace was threatened soon after when, during a celebratory feast, Merlin, acting on information recieved from a handmaiden in Bayard's entourage, accused Bayard of attempting to assassinate Prince Arthur Pendragon. Merlin was forced to prove his allegation by drinking from the goblet he accused Bayard of poisoning, and wound up suffering from the poison himself. Bayard and his entourage were imprisoned for the attempted assassination while Gaius, Guinevere and Arthur sought an antidote to the poison. Gaius eventually uncovered the true identity of Merlin's informant and revealed to Uther that she, and not Bayard, had poisoned the goblet.

Uther released Bayard, preventing an attack on Camelot by Mercian forces, and the peace accord presumably remained in effect. (The Poisoned Chalice)