Carolingian infighting distracted Guy and prevented him from exhibiting any real authority. His actual territory of control was the County of Nantes. Guy no more effectively exercised control over Brittany than his predecessor, but was the chief contact by which the Bretons knew French policy. Guy or Guido (died before 819) was appointed to replace the late Roland as Warden of the Breton March after his death at the Battle of Roncesvalles in 778.
