The draco ("dragon" or "serpent", plural dracones) was a military standard of the Roman cavalry.
[citation needed] According to Vegetius, in the fourth century a draco was carried by each legionary cohort.
During the charge is when they most resemble creatures: they are inflated by the wind, and even make a sort of hissing sound as the air is forced through them.
[4] Arrian says the colorful banners offer visual pleasure and amazement, but also help the riders position themselves correctly in the complicated drills.
[6] The draco is depicted on the Ludovisi battle sarcophagus, above the horseman who is the central figure in the composition.