847 Vikings was bribed to leave Brittany

BrittanyA group of Danish Vikings landed in Brittany and started plundering in the Breton March. Duke Nominoe of Brittany failed to defeat them in battle, but manage to bribe with gifts and persuaded the Vikings to sail away (approximate date)
Ireland
Agonn (Haakon) and his viking raiders were looting in Ireland.

Did the Vikings get Covid? No Covid did not exist at that time.