I want to know the answer to the following question:
Along with the British Isles, with what land did the Carolingians trade?
All the background I'm provided with is that "The coronation of Charlemagne as emperor on Christmas Day 800 is regarded as a turning point in medieval history, marking a return of the Western Roman Empire, since the new emperor ruled over much of the area previously controlled by the western emperors.". Is that enough to answer the question?