|King of Macedonia|
|Reign||239 to 229 BC|
|Predecessor||Antigonus II Gonatas|
|Successor||Antigonus III Doson|
|Died||229 BC (aged c. 45)|
|Spouse||Stratonice of Macedon |
Nicaea of Corinth
Phthia of Macedon
|Issue||Apama III |
Philip V of Macedon
|Father||Antigonus II Gonatas|
Demetrius II Aetolicus (Greek: Δημήτριος ὁ Αἰτωλικός) was the son of Antigonus II Gonatas and Phila who reigned as king of Macedonia from the winter of 239 to the spring of 229 BC.: 317
Demetrius II belonged to the Antigonid dynasty and was born in 275 BC.: 317 He had already distinguished himself during his father's lifetime by defeating Alexander II of Epirus at Derdia and so saving Macedonia (c. 260 BC). There is a possibility: 317 that his father had already elevated him to position of power equal to his own before his death. If this had occurred it would be in 256 or 257 BC.
On his accession, Demetrius faced a coalition of enemies which included the two great leagues. Usually rivals, the Aetolian and Achaean Leagues now became allies against the Macedonian power. He succeeded in dealing this coalition severe blows, wresting Boeotia from their alliance. The revolution in Epirus, which substituted a republican league for the monarchy, gravely weakened his position.
During his reign, his kingdom extended: 321 into Euboea, Magnesia, Thessaly and its environs, excluding Dolopia and possibly Peparethos and Achaea Phthiotis.
In 236 BC, he invaded Boeotia, making the Boeotians submit: 326 immediately.
In 234 BC, due to a federal republic replacing the monarchy in Epirus, which led to the events of 231 BC, Demetrius hired Agron for military aid against the advancing Aetolians. His kingdom was not: 323 threatened by the Illyrian Ardiaei, ruled by Agron, despite them having gathered the greatest force in their history (c. 231 BC), but Epirus needed some sort of force to deter them.
At some point in 230-229 in an unknown location in north-west Macedonia, the Dardani defeated Demetrius who died shortly the next spring at the age of c. 45. His nine year old successor, the future Philip V, was deemed too young to rule by the Macedonian nobility and so Demetrius' half-cousin, Antigonus III Doson, was made regent. The exact location of Demetrius' tomb remains unknown, but was likely in Beroea or Aegae.
Demetrius married four times, though the chronology of these marriages is a matter of dispute.
Information: 317 regarding the life of Demetrius is drawn mainly from inscriptions, as only Plutarch writes of him, in Life of Aratus, and Polybius makes scarce mention of him.