A little something i cooked up out of boredom. It's the flag of the Byzantine Empire, had it survived and repelled the ottoman invasions of the 1400s. The flag retains the byzantine red and gold color scheme. It also has the laurels, which represent the glory of ancient Rome. The double headed eagle is the imperial crest of the last Byzantine dynasty, the Palaiologoi.
I guess it came from a story i've been thinking up, involving the resurgence of Byzantium under an emperor who presided over the development of a repeating rifle before all other civilizations.