In 633 he sought revenge, invading Northumbria and engaging its king in battle. The two armies met at a place called Hæthfelth, usually reckoned to be Hatfield Chase near Doncaster, and there Eadwine was killed on 12 October, dying at the age of forty-seven. With him perished many other Northumbrians, including one of his own sons. His severed head was brought to York and placed in the unfinished church of St Peter.64