I dunno I kinda like the history bit... much better than a fairy tale. as long as it doesn't read like a text book ya know.
Yeah.. TH White showed up first in my google searches... whats the caveat?
Warlord Chronicles. Totally.
It's not the Arthur you know - its set in the real Dark Ages, and is based a fair bit on the ancient (and far older than the one your familiar with) and original Welsh legends. Arthur is not an English king riding to save England, he is a British/Welsh Warlord fighting to drive the English back into the sea. It's literally set in Britain's last days, when the British/Welsh are losing ground as the invading English & Irish pour in from overseas. And to top it all, the bigoted christians are causing huge amounts of trouble, Pagans are being murdered, there are Christian revolts.
It uses the basic structure of the anglicised stuff - battles like Mynydd Baddon (Mount Badon) and Camlan will happen, Camelot though is not a place, its an idea of a peaceful, just land.
He apologises as he is basing it on the Welsh for having Lancelot even in the story, as he doesnt exist in the Welsh stories, but, especially given the origin of the stories, and the fact there is no "France" or French people at the time the novels are set, remakes Lancelot into a Breton.
Amazing trilogy, and because its one of the very few to portray Arthur as a real man, with real hopes and dreams and weaknesses, its all the more heart breaking when the end reaches the obvious end, at Camlan.
They are told from the point of view of Derfel Cadarn, a saxon, captured as a child and brought up by Merlin, who becomes one of Arthur's War Lords, now an elderly monk. When He starts telling the story, its about the Struggle of the Britons to keep out the foreign invaders overrunning this island, its Britons v English & Irish to simplify it, as he is telling the story as an elderly Monk, the Britons have lost. The Island of the Mighty is no more, there are now 3 "nations" of different peoples, Wales, England and Scotland.