Say, does Wolves Upon The Coast have an Appendix N? Any books or films that helped inspire it?
These are just the ones off the top of my head - I keep a list of everything I've read since some point in 2021, you can see it here
Eaters of the Dead -Michael Crichton and it's film adaptation The 13th Warrior
The Saxon Stories, the Warlord Chronicles - Bernard Cornwell
Any of the Russian early Medieval action adventure movies on the streaming services. They are of varying quality but all have at least one great visual or conceptual nugget