It is said that three sisters of Hingwar and Habba [Ivar and Ubbe], i.e., the daughters of Ragnar Loðbrok, had woven that banner and gotten it ready during one single midday's time. Further it is said that if they were going to win a battle in which they followed that signum, there was to be seen, in the center of the signum, a raven, gaily flapping its wings. But if they were going to be defeated, the raven dropped motionless. And this always proved true!
The army of King Cnut the Great of England, Norway and Denmark bore a raven banner made from white silk at the Battle of Ashingdon in 1016. The Encomium Emmae reports that Cnut had
And a Viking moral patch
Til Valhall PVC 3D Patch Viking Military & Tactical Army Morale Velcro Hook and Loop Black & Gray (Gray)
Or Thor's Hammer, Mjolnir.