Roman military standards
Roman military standards were emblems adopted by units of the Roman army. There were three main types of standard.
Several throughout its history include:Aquila, the emblem of the Roman legion whose adoption Pliny the Elder attributes to the general Gaius Marius. Each legion had an eagle, or aquila, carried by an aquilifer;Vexillum, the emblem of a legion, cohors, numerus or detachments of such units. This was a flag attached to the top of the pole. One type had the name and number of the legion on it. Others were used by detachments serving away from the legion;Draco, a cavalry standard later adopted also by infantry units;Labarum, personal ensign of emperor Constantine I, later adopted as army standard.Signum, Each century had its own standard, called a signum. Signa had lots of symbols attached to the pole. Imago, Standard showed the emperor.