Sextus Julius Frontius & Pubius Flavius Vegetius Renatius 
Stratagems [EPUB ebook] 

Stratagems: The Roman Strategy at War is a combination of two ancient Roman texts, Stratagems by Sextus Julius Frontius from the first century AD and Concerning Military Matters by Publius Flavius Vegetius Renatius from the fourth century AD. These classic surviving texts cover examples of ancient strategy for use by generals as well as the organization of the army in the later stages of the Empire.