Arvorian conquest of Prydain (Fidem Pacis)

The conquest of Wales by Hywel Gorchfygwr ap Cynan, King of Arvor, restored the ancient links between Albion and the Britons who had settled on the continent centuries before. It made Wales a key player in continental diplomacy, which would enrich the country in years to come, but in the short term it cost the Welsh people dearly as the conquerors installed themselves in the highest positions. The conquest introduced many continental words and phrases into the Welsh and West Frisian languages, created a new ruling class which largely followed continental customs, and slowly caused Islam, the religion of the conquerors, to supplant Celtic Christianity as the main faith followed in the Albic Isles.