From the publisher's blurb:
Axioms is Autarch's quarterly supplement for the Adventurer Conqueror King System. Each issue of Axioms offers a mix of short content updates for ACKS, such as new classes, new sub-mechanical systems, explorations of specific themes within the game, short adventure scenarios, and more.
In this, our fourth issue, let he who seeks peace prepare for war... This issue represents a huge expansion to our Domains at War system and includes a special 12-page insert with full-color play aids and Judge's reference screens.
Pitching Battle: A revised approach for abstract battle resolution.
Aide-de-Camp: Printable play aids for the revised battle system.
Elite Troops: History's best soldiers are now at your command.
Morituri Te Salutant: Bringing gladiatorial games to your campaign setting!
While designed for use with ACKS, content in Axioms is compatible with any d20-based fantasy RPG built on the OGL.
Axioms is made possible through the support of our patrons, who receive early access to the articles on a month-by-month basis. If you're already a patron, thanks for your support! To learn more, visit https://www.patreon.com/Autarch