The Portuguese Army of the Napoleonic Wars (Men-at-Arms) (ISBN 0850452511)

Portuguese Army in Napoleonic Wars:
It is hard to find a book in English dealing with the subject of the Portuguese Army so this general overview of Portuguese Army is good. Good pictures and maps to help the reader to get a better understanding of events.

Interesting:
A very interesting and useful source to know more about Portuguese army. Pictures very accurate. Flags and standards not so accurate.

Hard to find info on little known army:
Pivka takes the time in this entry to really delve into the political events etc. that contributed to the condition of Portugal's military at the time of the French invasion as well as meticulously detailing the uniforms and particularly the colors of the uniforms of the Portuguese regiments. An essential volume for anyone modeling the Penninsular War.