stylistic:tone, quality:correction
Norman allies

Several Breton lords helped William the Conqueror to invade England and the Bretons formed over a third of the landing force in 1066. They received large estates there (e.g. William's double-second cousin Alan Rufus and the latter's brother Brian of Brittany). The Bretons helped to liberate the Cornish, replacing Anglo-Saxon land owners. Some of these lords were powerful rivals.