If you prefer public domain resources that are free to download as PDF, EPUB, or Kindle files:

: It is also available as a Kindle ebook on Amazon . Permanently Free Historical eBooks

While there is no single " Ancient Battle Formations " ebook that is permanently free without a subscription, you can access the most relevant modern title by Justin Swanton through free trials or find classic historical texts in the public domain.

: A classic military analysis that compares the Greek phalanx and Roman legion. Available for free on Project Gutenberg and Internet Archive .

: You can read it for free with a 30-day trial on Everand or a 14-day trial on Rakuten Kobo .

: This is the definitive modern text on the subject, covering Greek, Roman, and Macedonian formations.

: Extensive scholarly resource available to borrow or download on Internet Archive . Community Shared Resources Ancient Battle Formations - Swanton, Justin - Amazon