[MR] 80s series about King Arthur

[Anthony Stevens]

Perhaps she is referring to Jack Whyte's Camulod Chronicles?
This series of historical novels presents the tale of King Arthur set
against the backdrop of Roman Britain and relies on the historical
condition of post-Roman Britain to support the theory that Arthur was meant
to counter the anarchy left by the Roman departure from Britain in 410 AD.
-- 
Anthony Stevens
Come visit an Urban Fantasy world!
http://MasterAnthonyStevens.com