sentences:  Also, while East Anglia had been under sustained attack from Mercia through much of the 7th century up to Seaxwulf's time, his contemporary King Æthelhere of East Anglia is seen as a "Mercian dependent".Thus the entire region in which Seaxwulf operated was, at the time, under Mercian domination.The following details suggest a possible milieu within which Seaxwulf operated.