"Fantasy wargaming" was published in 1982 and is deeply rooted in medieval history, trying to recreate the feeling of that period. It does a tremendous job in that sense, as i hope to highlight later, especially in trying to convey the feeling of the incantations available to magicians and what to speak of the cleric's faith, on which their ability to call their divinity is founded.
Together with "Chivalry & Sorcery", i know of no other vintage role-playing game so focused in detail on the medieval time period and in this respect the first lenghty part of the book is worth reading just for this fact, regardless of its usage as a fantasy game.
Fantasy wargaming (FW), is in my top ten old school fantasy rpg, and it should really be rediscovered.
Go read the introduction below and find out why the author believes that "D&D is unsatisfactory".