Roman military standards

Roman military standards were emblems adopted by units of the Roman army. Several throughout its history include:

• Aquila, the emblem of the Roman legion whose adoption Pliny the Elder attributes to the general Gaius Marius;
• Vexillum, the emblem of a legion, cohors, numerus or detachments of such units;
• Draco, a cavalry standard later adopted also by infantry units;
• Labarum, personal ensign of emperor Constantine I, later adopted as army standard.