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Philip III of Macedon

King of Macedon from 323 to 317 BC

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The ancient sources describe Arrhidaeus as having some kind of intellectual impairment, although historians have noted that the Ancient Greeks viewed deafness and muteness as an intellectual disability, and therefore we cannot rule out that Arrhidaeus was not physically disabled. Plutarch was of the view that he became disabled by means of an attempt on his life by Philip II's wife, Queen Olympias, who wanted to eliminate a possible rival to her son, Alexander, through the employment of pharmaka (drugs/spells); however, most modern authorities doubt the truth of this claim.

Alexander was fond of Arrhidaeus and took him on his campaigns, both to protect his life and to prevent his use as a pawn in any prospective challenge for the throne. After Alexander's death in Babylon in 323 BC, the Macedonian army in Asia proclaimed Arrhidaeus as king; however, he served merely as a figurehead and as the pawn of a series of powerful generals.

Biography

Even though Arrhidaeus and Alexander were about the same age, Arrhidaeus appears never to have been a danger as an alternative choice for Alexander's succession to Philip II. Nevertheless, when the Persian satrap of Caria, Pixodarus, proposed his daughter in marriage to Alexander, the king declined, offering his son Arrhidaeus as husband instead, and Alexander thought it prudent to block the dynastic union (which might have produced a possible future heir to Philip's domain before Alexander himself did), resulting in considerable irritation on the part of his father (337 BC).

Arrhidaeus's whereabouts during the reign of his brother Alexander are unclear from the extant sources; what is certain is that no civil or military command was given to him in those thirteen years (336–323 BC).

Succession

Arrhidaeus was in Babylon at the time of Alexander's death on 10 June 323 BC. A succession crisis ensued. Arrhidaeus was the most obvious candidate, but he was mentally disabled and thus unfit to rule. A conflict then arose between Perdiccas, leader of the cavalry, and Meleager, who commanded the phalanx: the first wanted to wait to see if Roxana, Alexander's pregnant wife, would deliver a son while Meleager objected that Arrhidaeus should be chosen king. A compromise was engineered in which Arrhidaeus would become king with the name of Philip III, and would be joined by Roxana's yet-unborn child as co-sovereign should that child prove to be a male. This eventuality did indeed arise and resulted in Roxana's son, Alexander, becoming with his uncle Phillip co-sovereign on the throne of Macedon. It was immediately decided that Philip Arrhidaeus would reign, but not rule: this was to be the prerogative of the new regent, Perdiccas.

When news arrived in Macedonia that Arrhidaeus had been chosen as king, Cynane, a daughter of Philip II, developed a plan to travel to Asia and offer the new king her daughter Eurydice for his wife. This move was an obvious affront to the regent, whom Cynane had completely bypassed, and to prevent the marriage, Perdiccas sent his brother, Alcetas, to kill Cynane. The reaction among the troops generated by this murder was such that the regent had to give up his opposition to the proposed match and accept the marriage. From that moment on, Philip Arrhidaeus was to be under the sway of his bride, a proud and determined woman bent on substantiating her husband's power.

While most historians are of the view that Arrhidaeus was given no significant authority during his reign as King, historian Alexandra Morris proposes that the figure in charge of transporting Alexander's body to Egypt was in fact his half-brother Arrhidaeus. The histories only mention that a certain "Arrhidaeus" (who was noted to be a satrap) was in charge of the funerary car, and most historians have taken this to be a separate figure, although Morris points out that there is no evidence for this. However, this view has not gained significant support among historians.

Regents

Eurydice's chance to increase her husband's power came when the first war of the Diadochi sealed the fate of Perdiccas, making a new settlement necessary. An agreement was made at Triparadisus in Syria in 321 BC. Eurydice moved deftly enough to achieve the removal of the first two designated regents, Peithon and Arrhidaeus (a namesake of her husband), but was powerless to block the aspirations of Antipater, whose position proved too powerful, and the latter was made the new regent; Philip Arrhidaeus and Eurydice were forced to follow Antipater back to Macedonia.

The regent died of natural causes the following year, nominating as his successor not his son Cassander, but his friend and lieutenant, Polyperchon. Cassander's refusal to accept his father's decision sparked the Second War of the Diadochi, in which Eurydice saw once again a chance to free Philip from the control of the regent.

An opportunity presented itself in 317 BC when Cassander expelled Polyperchon from Macedonia. Eurydice immediately allied herself with Cassander and persuaded her husband to nominate him as the new regent. Cassander reciprocated by leaving her in full control of the country when he left to campaign in Greece.

Death

That same year (317 BC), Polyperchon and Olympias allied with her cousin, Aeacides, king of Epirus, and invaded Macedonia. The Macedonian troops refused to fight Olympias, the mother of Alexander. Philip and Eurydice had no choice but to escape, only to be captured at Amphipolis and thrown into prison.

It soon became clear that Philip was too dangerous to be left alive, as Olympias's many enemies saw him as a useful tool against her. She had him executed, while his wife was forced to commit suicide.

The lunar crater Ariadaeus was named after him.

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