While light on detailed information of the units described in this book, it is nonetheless an excellent visual guide of the uniforms and equipment used by the Roman military units stationed in the western provinces. Combined with Osprey's two earlier books on the Roman units of the western provinces, which cover a combined time frame from the 1st century BC to the 3rd century AD, the reader gets a good resource to use for wargaming, or visual reference. The text is minimal in this book, so those looking for an in-depth history of the units would be better served with a traditionally written history book. I received the book for free from the publisher in exchange for an honest review, and as such, all opinions are my own.