<p>"Si vis pacem, para bellum." -Flavius Vegetius Renatus, <em>The Military Institutions of the Romans</em>, (390 A.D.)</p><p><br></p><p> <em>The Military Institutions of the Romans</em> (original title in Latin <em>De re militari</em>) is a treatise by Vegetius, a 4^th century Roman writer about Roman warfare and military principles. This treatise taught the lessons of the Ancient Roman way of war to the political and military leadership of the 4^th century.</p><p><br></p><p>During the following centuries, <em>The Military Institutions of the Romans</em> became the most influential military guide for military leaders and officers throughout Europe from the Middle Ages into the 18th and 19th centuries. Even today, it is a valued source of policy and strategy relevant to modern day Western armies.</p><p><br></p><p>The current abridged edition, including Books I-III, was translated by Lieutenant John Clarke in 1767. &nbsp;&nbsp;</p><p> </p>