The Danes are seen by modern historians as an example of the beginning of the process of centralization right in a place like Denmark. The trend that's taking over the one that's the hierarchical society with a king at the top is spreading and it's been spreading northwards for generations. This trend is continuing northward Norway and Sweden are still farther north from here but we've stumbled back into the middle of a process here. It makes them more dangerous to a person like Charlemagne.
This show picks up where Dan's Thor's Angels show left off. In the early Middle Ages Pagan Germanic-language speakers like the Vikings are a dying breed. Many of their contemporaries wish they'd die faster.