: The book moved away from strict sub-faction locked rules, allowing players to mix and match traits to better represent their specific custom army. New Heavy Hitters : The massive Rogal Dorn Battle Tank Lord Solar Leontus
: Updated rules for customizing vehicles with special abilities like improved armor or better maneuvering. New Units and Departures 9th Edition Astra Militarum Codex Pdf
The Codex formally integrated the Militarum Tempestus (Scions) as a standalone force within the book, rather than a simple Elites choice for the main Guard. They received their own Tempestus Doctrines, allowing them to Deep Strike with surgical precision, distinct from the standard Guard regiments. : The book moved away from strict sub-faction
: The Rogal Dorn Battle Tank, Lord Solar Leontus, Ursula Creed, and updated plastic Kasrkin and Rough Riders. They received their own Tempestus Doctrines, allowing them
: A free Astra Militarum Index PDF is available on Warhammer Community , providing core datasheets and army rules like "Voice of Command".