Push and Pull Factors for the Invasions

So, what are the push and pull factors that drive these expeditions? And from their point of view. How powerful is the king in the first place,. maybe, how much support does he have? So we know that in ten 85, m, confusingly, also called canute, but a different canute to the famous m canute that rules england. The idea of inheritance may be as well, that, you know, maybe the danes are trying sort of get their inheritance from canute - just there's been hic up in the middle.