Thrace is a regional power in the Balkans, controlling the coastal south and east of the region of Thrace proper. Founded as a Argead satrapy assigned to Lysimachus after the death of Alexander the Great, Thrace in 450 AUC is the smallest and weakest of the remaining Diadochi states, allied with Macedon in the face of Antigonid dominance over Asia but facing stiff odds unless Egypt and the Seleukid Empire can be convinced to join the fray. Historically this coalition would emerge victorious in the last major war of the Diadochi, with Thrace given western Anatolia as its share of the former Antigonid lands and extending its rule over the smaller states of the northern coast, eventually extending its rule over Macedon as well after the fall of the Antipatrid dynasty. This success would prove to be short lived, with Thrace falling briefly to the Seleukos himself in 281 BC and then a revived Macedon under the Ptolemaic prince Ptolemy Keraunos before the kingdom's collapse at the hands of the Gauls. The Lysimachid dynasty itself would survive in the Egypt Ptolemaic client state of Telmessos for many decades afterwards, while Thrace itself would be divided between Antigonid Macedon, a resurgent Odrysia and Getia, and various independent city-states.
The Wars of the Diadochi
- Main article: Diadochi events
At start, all the Diadochi states will receive an event that gives them claims on all of the western half of the former Argead Empire and access to the special Legacy of Alexander wargoal, allowing them to easily declare war and conquer territory from each other. For Thrace, these claims will go away on the death of the first ruler.
Fourth War of the Diadochi
Shortly after the game starts, the Antigonid Kingdom will receive an event to make an ultimatum against Macedon, demanding they retreat from their remaining holdings in Greece. If war breaks out, after a few months Egypt and then the Seleukid Empire may join the fray and demand territorial concessions or go to war; some months after that, Thrace will also receive an event that will let it join the fray and directly declare war on the Antigonids or present an ultimatum to cede the border regions of Asia and Bithynia in exchange for a truce.
Amastris marriage events
A few years into the game, Lysimachus will receive an event allowing him to propose his historical marriage to Amastris, the queen of Heraclea Pontica. He can then choose to extend the offer, which if accepted will have Amastris will leave Heraclea Pontica to her heir and join Lysimachus in Thrace who will extend a guarantee to her old kingdom, or get claims on the area to extend Thrace's influence more aggressively.
If 20px Pergamon is released from Phrygia as the result of the The Antigonid Cause Wavers event and Lysimachus is still alive, Thrace will get an event to either offer tributary status to the newly released country or get claims on the bordering provinces, representing Thrace's historical expansion into the area. 20px Pergamon can also be released as a client state if Thrace manages to conquer much of Asia from Phrygia.
In the early part of the game, Thrace will get an event allowing it to choose how to deal with Odrysia, with choices including declaring war to directly annex it, seizing several neighbouring territories, and forcibly converting it into a client state. This is useful as Odrysia beings as a tribal vassal, which cannot be integrated or annexed without breaking the subject relationship altogether.
Thrace also has a few flavour events revolving around Lysimachus and his history as a bodyguard and companion of Alexander the Great himself.
As a Hellenistic culture group monarchy, Thrace has access to the decision to reform the Argead Empire.
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.
Thrace has a population of 317 spread over its 38 territories, the majority Propontic Hellenic concentrated along the coasts with a few Macedonian Hellenic pops scattered between some of the southern coastal territories. The northern and inland unsettled provinces are instead predominantly Odrysian, Moesi and Getian (in the Dacian culture group), split between Hellenic and Zalmoxian and comprising some 30% of the population.