Cataphract (Civ5)/Civilopedia

Among the most heavily-armored forms of cavalry used throughout history, the Cataphract was a formidable opponent on the battlefield. With horses draped in chain mail or plated armor, and the rider himself in an equally impressive suit of armor, these mounted units were used primarily for crushing through the lines of enemy infantry they faced. The Byzantine Empire was known to have made extensive use of Cataphracts throughout its storied history, as they played a prominent role in defending the empire following the decline of their Roman brethren in the west.