Byzantion is a local power in the Thrace region, a Megaran colony founded on the western side of Bosphorus Strait to control the rich trading routes to the Euxine Sea near the border of the Greek and Persian worlds. As a small city state squeezed between the more powerful Diadochi kingdom of Thrace to the west and the smaller powers of northern Anatolia to the east, with the major power of the Antigonid Kingdom and its many feudatories nearby to the south, Byzantion is in a relatively difficult position and will have to play its diplomatic hand well or expand its power base quickly if it hopes not to be dominated by larger powers. Ruled by Archon Ioannes Ioannus Caesar in 450 AUC, Byzantion would historically survive the Wars of the Diadochi and subsequent Celtic invasions before peacefully submitting as a Roman subject, taking advantage of the many trade routes passing through the area and its strategic position between Europe and Asia to become a rich, prosperous city worthy of being an imperial capital.
- Main article: Greek missions#The Hospitable Sea
As a Thracian culture country, Byzantion has access to the unique Euxine Sea Hellenistic cultural mission tree The Hospitable Sea from game start, directing it to expand its influence and dominate the Euxine Sea region. Like most other Hellenistic group countries, if Byzantion conquers territory in Greece it can also get the Greek cultural mission tree Pan-Hellenic Government and attempt to unite the Greek city-states into a new Hellenic League.
Like all other countries, Byzantion also has access to the generic missions at all times.
As Byzantion has Hellenistic primary culture, it can take the decision to reunite Alexander the Great's empire and form the Argead Empire if it controls the required territories. This, however, will require Byzantion to change its government type to a monarchy.
Reunite Alexander's Empire
That one power could not possibly come from any dynasty but our own. Only a family that respects the Argead traditions can legitimately claim its legacy.
Byzantion starts off with a population of 26 in its 3 territories, all of whom are Hellenic Propontic. The population type breakdown is listed below:
Byzantion's starting cities produce Fish (Philia), Cloth (Selymbria) and Earthenware (Byzantion). The capital of Byzantion also has the special Bosphorus modifier, giving +10% Local Tax and +10% Fort Defence.