Recently I talked about the human tendency to grab power, and the tendency to self-destruct as a result. I wanted to look at a very fascinating, but often forgotten, period of Western history: the Wars of the Diadochoi, probably one of the most clear expressions of this tendency.
The Greek term diadochos (διάδοχος) means “successor”, or in plural diadochoi (διάδοχοι). These were the troops of Alexander the Great, who had marched with him all the way to India, battle after battle, and were present when he died in the city of Babylon on June 10th, in 323 BC.
Alexander’s premature death left the small Greek kingdom of Macedon ruling a vast empire stretching all the way from Macedon and Greece, down to Egypt, and east to central Asia and northwestern India. Much of this territory had been administered under the Achaemenid Persians as “Satrapies” each with their own king. The Achaemenid emperor ruled these local kings as the “king of kings”.
But as soon as Alexander the Great died, this empire unravelled.
Alexander, in true fashion, had rushed headlong in one invasion after another, with no clear plan how to rule the newly acquired territory. Alexander was a military genius who never lost a battle, and was genuinely convinced he was the son of a god. Yet, he was also extremely impetuous and didn’t really have a long-term plan other than a vague notion of Greco-Persian empire.
Upon his sudden death, his close confidants (philoi, φίλοι), generals, and various troops quickly divided into factions who rallied behind one successor of Alexander or another, while also scrambling for territory (satraps).
Update: Extra History put out a really nice video summarizing these early years of conflict:
Anyhow, to put it mildly, this scramble for power, territory, and regency of the heirs unleashed one war after another, from Greece to Central Asia, from Egypt to Asia Minor:
- First War of the Diadochoi (321–319 BCE) – an alliance against general Perdiccas who sought to expand his regency by marrying Alexander’s daughter, resulted in the death of Perdiccas who was betrayed by his men who worked out a deal with the opposing faction. During this time, Ptolemy stole Alexander’s body and escaped to Egypt. Seleucus (one of Perdiccas’s murderers) made a deal with Ptolemy. Remember these two men.
- Second War of the Diadochoi (318–316 BCE) – the new preeminent power, Antigonus, went to war against a faction challenging his authority in Mesopotamia. By the end of this long, complex war of shifting alliances, Ptolemy was now firmly in control of Egypt as Ptolemy I Soter (“savior”), and Antigonus was still the strongest power who reigned as Antigonus I Monopthalmus (“the one-eyed”). Macedon was ruled by Cassander who also instrumented the death of Alexander the Great’s primary heir, Alexander the IV. By this point the empire had broken up into massive dynasties, with no more pretense of ruling in Alexander’s stead.
- Third War of the Diadochoi (315–311 BCE) – continued wars by Antigonus against an increasingly powerful Seleucus who built a power-base from the eastern Satraps, and also with Ptolemy I in Egypt. Antigonus was unable to decisively defeat either, and things devolved into a detente.
- Babylonian War (311–309 BCE) – the war between Antigonus and Seleucus resumes, and ultimately Antigonus is later defeated by Seleucus and a coalition of other Diadochoi at the Battle of Ipsus in 301 BCE. Seleucus now rules the remnants of the Persian empire as Seleucus I Nicator (“the victorious”).
- Fourth War of the Diadochi (307–301 BCE) – This was a prolonged four-way battle between Antigonus I, who now ruled Macedon with his son Demetrius I Poliorcetes (“besieger of cities”), Ptomley I in Egypt, Seleucus I in Mesopotamia, and Lysimachus (another successor) who ruled Asia Minor. By this point, the various dynasties were mostly stable now, but further battles continued:
- A prolonged three-way war from 298–285 BCE between Demetrius I Polircetes, Phyrrus of Epirus, and Cassander’s sons, resulting ultimately in Demetrius’s death, but succession by his son Antigonus II Gonatas and thus establishment of the Antigonid Dynasty.
- Meanwhile, Seleucus I and Lysimachus battled for a long time (285–281 BCE) until Lysimachus was killed in battle in 281 BCE. It should be noted that Seleucus’s victory was as close to reunification of Alexander’s empire as the Diadochoi ever came. However, Seleucus I was murdered while marching to Europe by his ally, Ptolemy Ceraunus, an ousted son of Ptolemy I, for reasons unknown. Seleucus’s son, Antiochus I Soter, established the Seleucid Empire in Mesopotamia, Persia, and the east.
- The last struggle was Ptolemy Ceraunus’s brief seizure of power in 281 BCE in Macedon, but his reign was unexpectedly cut short due to a massive invasion of Celtic tribes into Macedon, Greece, and even Asian minor. These Celts later came to rule a territory known as Galatia for centuries. With Ceraunus dead, the Antogonid’s reclaimed power in Macedon and ruled for centuries.
Thus, by 280 or so, the various successors and powers had finally settled into three great dynasties:
- the Antigonid Dynasty (Greece/Macedon),
- the Ptolemaic Dynasty (Egypt, eastern Mediterranean), and
- the Seleucid Empire (Mesopotamia, Persia, etc).

A fourth Hellenstic dynasty, the Attalids, came to rule a small, but powerful state in western Asia Minor, and were a close ally of Rome for generations, while a fifth dynasty (a hybrid Greco-Persian one), ruled the Black Sea as the Mithridatic or Pontic Dynasty until they too were annexed by Rome. And then we have the Bactrian-Greeks far to the east as well.
Aside from the Bactrian Greeks, each of these dynasties ruled their respective lands for the next three centuries, a period known in history as the Hellenistic Period, until the rise of the Roman Republic who destroyed them one at a time.
The four wars of the Diadochoi make Game of Thrones look mild. There was so much switching of sides, backstabbings, intritrigue, scandals, and of course constant warfare. The excellent Hellenistic Age Podcast spends the first twenty episodes alone covering this conflict. And even after the wars had settled down, the constant struggles between the Antigonids, Ptolemies and Seleucids never really ended. They fought dynastic battles within their own families, but also constant battles with one another. The Ptolemies and Seleucids in particular fought six wars over a territory called Coele-Syria (modern Lebanon and Syria, sometimes included modern Israel and Palestine) until the Ptolemies finally lost it for good. The Book of Daniel in the Old Testament even alludes to this war between the “king of the north” and “king of the south”.
Next time, we’ll look more into how these different dynasties thrived and survived (until the Romans came), and how each took on different personalities.


























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