Example image of eyePlorer eyePlorer map for 'Battle of Hatfield Chase': Annales Cambriae 633 Cadwallon ap Cadfan Doncaster Edwin of Northumbria England Hatfield Chase History of Anglo-Saxon England Kingdom of Gwynedd Mercia Northumbria October 12 Penda of Mercia Wales Yorkshire Great Britain Isle of Anglesey Puffin Island, Anglesey Bede Hatfield, South Yorkshire Bernicia Deira Eanfrith of Bernicia Osric of Deira Æthelfrith of Northumbria Battle of Heavenfield Oswald of Northumbria Edwinstowe Hatfield Manor House Pellitus Battle of Maserfield List of battles 601–1400 Pybba of Mercia Historia ecclesiastica gentis Anglorum List of battles (geographic) Battle of the Winwaed James the Deacon Æthelburg of Kent 7th century in England Eanflæd Ebrauc Iago ap Beli Cadafael Cadomedd ap Cynfeddw Anglo-Saxon paganism Cadfan ap Iago Æthelred of Mercia Wulfhere of Mercia Oswiu of Northumbria History of Northumberland Paulinus of York