Types of cavalry unit in the army of ancient Rome

The equites (lit. 'horse' or 'cavalrymen', though sometimes referred to as "knights" in English) constituted the second of the property/social-based classes of ancient Rome, ranking below the senatorial class. A member of the equestrian order was known as an eques .

The Roman legionary (in Latin legionarius; pl.: legionarii) was a citizen soldier of the Roman army. These soldiers would conquer and defend the territories of ancient Rome during the Republic and Principate eras, alongside auxiliary and cavalry detachments. At its height, Roman Legionnaires were viewed as the foremost fighting force in the Roman world, with commentators such as Vegetius praising their fighting effectiveness centuries after the classical Roman legionary disappeared.