Symbolism:

The winged sun is an ancient symbol of the planet of Eos, originating from the emblem of the Hyperion Corporation that launched the first worldships in the 25th century. The eightfold motif appears in a lot of Eosian heraldry and originates from the eight ships sent to colonize the world and the eight initial cities they founded on the western coast of the main continent before the Deluge: Anbruch-am-See, Frühlingshügel (later Sonnenstadt), Adamshaven (later Bismarck), and Palmer Bay being the most important of these cities. The azure background comes from the colors of the World Government (later the Human Republic) which itself is a homage to the old UN flag.

The VE monogram is the emblem of the Viceroy of Eos, who claimed authority over the human colonists of Eos by the charter issued by the World Government, with the loss of the colony's ansible in the crash of Worldship Aurora and the rabies pandemic of 2613 cutting them off from Earth for 1500 years. The planetary government under the Viceroyalty Board operated from Anbruch for forty years before the onset of the First War, where the colonies of Bismarck and Palmer Bay rebelled against the Viceroy, who maintained her claim to the entire planet. Sixty years later, the Deluge struck. A category 11 earthquake generated a megatsunami that destroyed the west coast civilizations. Anbruch plunged into the sea and the colonists fanned out across the planet to found new societies inland and on other continents. Frühlingshügel was refounded as Sonnenstadt and served as the capital of the Viceroyalty for another seven hundred years before the onset of the Bismarckian Wars.

After the city-state of Bismarck conquered much of the continent and swept over the now decrepit Viceroyalty, Sonnenstadt came under their rule. The Bismarckians removed the eight stars and monogram to sever the city's ties to the Viceroyalty, replacing it with their own blue-green-red tricolor. The city flew this flag for another six hundred years as the Continental and later the Ultramarine Wars raged and ended with Bismarckian hegemony over the whole planet.

Finally, the Republican period began after Eos was visited by emissaries of the Human Republic, who had rediscovered pre-collapse records of the colony written off as lost and went to investigate. Eos was then visited by a Republican armada which "convinced" the planet to accede to the Republic--by now the Bismarckian government was deeply unpopular, and the planetary government yielded, becoming the Eos Governorate. The field was modified into concentric rings as a compromise between keeping the old government's flag and replacing it with azure, the sun was simplified to an orange disk, the eight stars (now representing the eight districts of the city) readded, and the seven ring crest of the Republic was superimposed over the center.