 The settlers were unaffected by Roman urban civilisation and had their own religion and language.As more of the region fell under their control, new kingdoms were formed, replacing the function of the Roman "territoria".Surrounded by sea, fenland, large defensive earthworks such as the Devil's Dyke and wide rivers, all of which acted to disconnect it from the rest of Britain, the land of the East Angles eventually became united by a single ruling dynasty, the Wuffingas.