Smuz said:Bear in mind that the Danes had already conquered England once- hence King Cnute and co. So there might not be as much resistance from the English as William got.
Given the Norman tactics of archers, horsemen and such vs the VIking/Saxon shield walls, I do wonder if there would be any change to European warfare towards the maintenance of shield wall tactics, or if the Vikings would adopt cavalry once they got settled in and weren't raiding from ships, as they did in other European areas.
Oh, and the daneaxe becomes a far more mainstream weapon with more shield walls to break
The dane-axe was quite useful against horsemen too--the Saxons used them to quite literally rip Norman warriors off their horses (and rip up the horses too).