of Epirus in 334 BC. He invaded Italy, but was killed in battle by a Lucanian in the Battle of Pandosia against several Italic tribes 331 BC. Aeacides of Epirus, who succeeded Alexander, espoused the cause of Olympias against Cassander, but was dethroned in 313 BC. His son Pyrrhus came to throne in 295 BC, and for six years fought against the Romans and Carthaginians in southern Italy and Sicily. The high cost of his victories against the Romans gave Epirus a new, but brief, importance, as well as a lasting contribution to the Greek language with the concept of a "Pyrrhic victory". Pyrrhus nonetheless brought great prosperity to Epirus, building the great theater of Dodona and a new suburb at Ambracia (now modern Arta), which he made his capital. The Aeacid dynasty ended in 232 BC, but Epirus remained a substantial power, unified under the auspices of the Epirote League as a federal state with its own parliament, or synedrion. However, it was faced with the growing threat of the expansionist Roman Republic, which fought a series of wars against Macedon. The League steered an uneasy neutral course in the first two Macedonian Wars but split in the Third Macedonian War (171–168 BC), with the Molossians siding with the Macedonians and the Chaonians and Thesprotians siding with Rome. The outcome was disastrous for Epirus; Molossia fell to Rome in 167 BC and 150,000 of its inhabitants were enslaved. Roman and Byzantine rule Epirus as a Roman province The region of Epirus was placed under the senatorial province of Achaea in 27 BC, with the exception of its northernmost part, which remained part of the province of Macedonia. Under Emperor Trajan, sometime between 103 and 114 AD, Epirus became a separate province, under a procurator Augusti. The new province extended from the Gulf of Aulon (Vlorë) and the Acroceraunian Mountains in the north to the lower course of the Acheloos River in the south, and included the northern Ionian Islands of Corfu, Lefkada, Ithaca, Cephallonia, and Zakynthos. Late Antiquity Probably during the provincial reorganization by Diocletian (r. 284–305), the western portion of the province of Macedonia along the Adriatic coast was split off into the province of New Epirus (). Although this territory was not traditionally part of Epirus proper as defined by the ancient geographers, and was historically inhabited by Illyrian tribes and Greeks, the name reflects the fact