"Autocrats encourage fan fiction"

Obviously with pre historical things we have to use our imagination since evidence is either scant or non-existent. But history now seems to accept more retconning and re-interpretations than before. Some re-interpretations do make sense when new evidence is found, but there are times when it’s done more for new narratives than actual truth seeking.

The Angles – ancestors of the English were the people whom he was fighting against.

Now was Arthur Roman or Celtic or Welsh etc is up to debate.

I only recently started to understand that the post-Roman "dark age" was not quite as dark as I thought it was. Scholars and other interested parties can tease out a fair amount of knowledge of these times. Even though it gets quite obscure.

I have a recent book by Caleb Howells about "King Arthur" and he goes into some interesting detail about some of this stuff. He also has a YouTube channel. There is real history to be discovered here still (but much can only ever remain speculative unfortunately).