In 331 BC, on the death of his cousin king Alexander, who was slain in Italy, Aeacides succeeded to the throne of Epirus.
[1] In 317 BC he assisted Polyperchon in restoring his cousin Olympias and the five-year-old king Alexander IV[2] to Macedonia.
The following year he had to march to the assistance of Olympias, who was hard pressed by Cassander; but the Epirots disliked the military service, rose against Aeacides, and drove him from the kingdom.
[3] In 313 BC, having become tired of the Macedonian rule, the people of Epirus recalled Aeacides (who until then had been campaigning with his old ally Polyperchon in the Peloponnese).
[4] Philip, who was poised to invade Aetolia, marched his army into Acarnania to prevent Aeacides from linking up with the Aetolians.