Thirty years of Danish raids on the east coast of England precede the arrival in East Anglia of a large army equipped for conquest, led by King Ivar the “Boneless” and King Halfdan.
Citation:
Editors. "A great Danish Viking army invades East Anglia".
The Literary Encyclopedia. First published 01 May 2009
[http://www.litencyc.com/php/stopics.php?rec=true&UID=6968, accessed 19 June 2013.]