It's a bit of a stretch to lump all of that in with the term Viking, though. I think the actual settlement and conquest is a different phenomenon. Like, I would

It's a bit of a stretch to lump all of that in with the term Viking, though. I think the actual settlement and conquest is a different phenomenon. Like, I wouldn't consider the Normans Vikings. When people think of the Viking age, it's more of the phenomenon of groups of men going on expeditions from Scandinavia to make amphibious assaults on soft targets. Most of the men who did this did a couple big scores and returned to village life back home. This transformed into settlement, adoption of Christianity, and then the carving out of the niches you identified. The Magyars had a similar arc. The Arabs, too, except that their raiding ended up steamrolling through the ailing Roman and Sassanian empires, leading to their own intercontinental empire and religion, rather than settling into existing systems.