Near East (225–214 BCE): Attalid-Pergamene Rivalry and…

225 BCE to 214 BCE

Near East (225–214 BCE): Attalid-Pergamene Rivalry and the Fourth Syrian War

After several years of relative peace, conflict in western Anatolia flares again in 218 BCE, as Attalus I of Pergamon recaptures his lost territories with assistance from Thracian Gauls, seizing an opportunity presented while his rival Achaeus, who had declared himself king in opposition to the Seleucid crown, is preoccupied with a campaign south of the Taurus Mountains at Selge.

Upon his return in 217 BCE, victorious from Selge, Achaeus immediately resumes hostilities against Attalus. This prompts Seleucid king Antiochus III the Great, acting under an alliance with Attalus, to intervene directly. Antiochus crosses the Taurus in 216 BCE, initiating a two-year siege of the key Anatolian city Sardis, the regional seat of Achaeus. In 214 BCE, Sardis finally falls to Antiochus, although Achaeus and his supporters maintain control of its citadel. Later, through an act of betrayal disguised as a rescue attempt, Achaeus is captured and executed, ending his challenge to Seleucid dominance.

In Egypt, the reign of the young king Ptolemy IV Philopator, inaugurated in 221 BCE by the assassination of his mother, Queen Berenice II, descends into internal chaos. Under the sway of manipulative courtiers such as the powerful minister Sosibius, the Egyptian court becomes marked by intrigue and widespread public unrest.

Recognizing Egypt's weakened condition, Antiochus III launches the Fourth Syrian War in 219 BCE, swiftly capturing Seleucia Pieria and key cities in Phoenicia, including Tyre. However, Antiochus hesitates for over a year in Phoenicia, consolidating gains rather than pressing immediately toward Egypt.

This delay allows Sosibius to reorganize the Egyptian army, recruiting extensively from native Egyptian populations—an unprecedented move under the Greek-dominated Ptolemaic rule. Approximately thirty thousand native Egyptians are enrolled and trained as phalangites. This new Egyptian force decisively engages Antiochus in 217 BCE at the Battle of Raphia, the largest military confrontation since Ipsus eighty years earlier. The unexpected Egyptian victory secures continued Ptolemaic control over Coele-Syria, though the hesitant Ptolemy IV fails to capitalize on this success by advancing further into Seleucid territory.

Despite this military success, Ptolemaic Egypt continues its decline, facing persistent economic struggles and internal rebellion—issues exacerbated by the empowerment of native Egyptian troops who begin to recognize their own strength within the faltering Greek regime.