Source
From the release:
Warhammer 40,000 Apocalypse: War Zone Pandorax is the third War Zone supplement to the Apocalypse rulebook. Each War Zone is based on a famous campaign from the history of the Warhammer 40,000 universe and describes the course of the war, the famous battles that were part of it, and the combatants that took part. It also includes all the special rules, missions and formations required to replay the campaign in games of Apocalypse.