History Section: 3/10: The war is given an overview, with some select battles being called out.
IMO, this section was not really in sync with Eberron's existing flavor for the countries. It didn't effectively convey the key moments of the way in meaningful ways (Warforged, Undead for Karrnath, Silver Flame beliefs), but instead kind of created charicatures of the nations and led them through a conflict. It felt very "battle tech/ innersphere" to me, rather than the more semi-realistic feel that Eberron had in the core book.
Encyclopedia Section: 8/10: Bunchs of little nuggets detailing different factors of the war, such as how different houses profited and such.
Campaign Advice: No Clue: I didn't really read much of it yet, got distracted.
Monsters/Magic Items: 8/10: the only real crunch in the book, well done, look neat. A Magic Item set, which is nice enough though probably too hard to actually use in a game.