Arslan Senki (TV), Vinland Saga Recommendations
I've seen first 3 episodes so far of Vinland. Both these anime have a young male protagonist in a historic time period. Vinland seems to be setting up for a war to take place in it and Arslan Senki was all about wars.
Arslan as a character has a fair resemblance to Knut in later parts of the show. Themes are at times similar.
Both epics involving honor, politicking (Vinland Saga less so), and battle. Both share the historical/action/adventure/drama genres. Vinland Saga doesn't have empire-building and its POV character is not a ruler of any sort, but does share a sort of similar atmosphere. Those who liked Arslan Senki for its action, journey, and intrigue more than its empire-building might enjoy Vinland Saga even more.
These 2 as a historical anime manages to encompass all the historical aspects, events with the feeling of fantasy and engaging story. Both of them are based in a warlike scenario, teaches the guilt of war and loss and follows the journey of insane character development of MC. They also deal with the reality of war, slavery, and the powerlessness of being poor in a country that only values money and at the same time shows the reasoning and mentality of the oppressors and somewhat reflects the history in making, and from that I mean our history in making.
Both animes have epic battles and a great story that follows the same theme: epic fight scenes and political issues.
Vinland's plot is set in Iceland, when a boy named Thorffin, due to various circumstances, ends up getting involved in several Viking conflicts in the Vinland region.
While in Arslan Senki, the protagonist sets out on a journey after allies so they can help him achieve his goal.