Around AD 1450 a new Mexican nation emerged called the Aztec Empire of the Triple Alliance. They succeeded in making themselves the most powerful and feared civilisation in the Americas. The Mixtec and Zapotec peoples were contemporaries of the Aztec nations, and both formed alliances and fought many wars against them. With Angus McBride's usual quality artwork on eight full page colour plates, plus plenty of other illustrations from various sources, this work by John Pohl investigates the history, uniforms and weaponry of Aztec, Mixtec and Zapotec armies.
This brief book offers a great introduction to the military cultures of the featured peoples. If you're unfamiliar with the names of the groups, it can get somewhat confusing, but it's brief and very easy to read so re-reading is no problem.
In addition to the general information about ranks, uniforms, and tactics, there is also an overview of military history with names and dates that helps to ground the details.
Finally, there are plenty of photographs and illustrations to help clarify what the author says. The illustrations, in particular, do a great job of visualizing the soldiers since the traditional artistic depictions are difficult to interpret for what I assume is most people.