The Byzantine war flag was the evolving standard of the Eastern Roman Empire, combining imperial authority, Orthodox Christian symbolism, and battlefield signaling. Often featuring the double-headed eagle, the labarum, or a crowned cross on a red field, these flags identified units, displayed dynastic emblems, and projected imperial power. This evergreen explainer covers verified attributes of the most common forms, their tactical and ceremonial roles, and how scholars interpret surviving texts, images, and comparative evidence to reconstruct how Byzantines used flags in combat and statecraft.
