Alexander IV of Macedon, was the posthumous son of
Alexander the Great by his wife
Roxana, a princess of
Bactria. He was born in
323 BC, a few months after his father's death and was immediately declared King as co-ruler of his uncle
Philip III of Macedon. Both Kings were incapable of making decisions since Philip was considered retarded and Alexander was just a infant. This resulted in the nomination of Regents ruling on their behalf and a number of his father's generals, now
Satraps of major provinces, gaining enough power to act independently from the throne.
During his nominal reign between 323 BC and 309 BC, the four Regents acting in his name were:
- Perdiccas, between 323 BC and his murder in June, 321 BC.
- Antipater, between the summer of 321 BC and the summer of 319 BC when he died of illness.
- Polyperchon, between 319 BC and 316 BC, a heir chosen by Antipater himself. Polyperchon was under the influence of Olympias, Alexander's grandmother, who ordered the execution of Philip III in 317 BC.
- Cassander, Antipater's son managed to defeat Polyperchon army's and to capture and execute Olympias. Between 316 BC and 309 BC the young King was the prisoner of his Regent.
On 309 BC Cassander had established his power over Macedonia, but, as Alexander came closer to adulthood, there were still people loyal to the Royal house looking forward to his becoming King in more than name. To avoid a possible threat to his own power Cassander ordered Alexander's murder. Alexander was 14 year old at the time of his murder. The Royalists still supported the claim of Alexander's half-brother Heracles to the throne against Cassander.