Aratus leads the Achaeans in defeating the…

Ptolemy manages to keep Ephesus, in Asia Minor, and several coastal areas in Thrace by the peace terms of the Third Syrian War, concluded in 241.

The Ptolemid forces are expelled from Mesopotamia and …

…part of North Syria in 242-241 BCE; …

…the Seleucids also recover the nearer provinces of Iran.

Antiochus Hierax, the younger brother of Seleucus II, had been sent as ruler to Seleucid Anatolia, where their mother Laodice is living.

Perhaps in league with his mother, late in the war with Egypt he sends an army into Syria ostensibly to assist Seleucus but actually to seize the rest of the empire.

The appearance of Hierax' troops, however, brings peace between Egypt and his brother.

By the peace terms of the Third Syrian War, concluded in 241, Ptolemy manages to keep the Orontes River region (Seleucia Pieria) and Antioch, both in Syria; and …

…perhaps also some coastal areas in Cilicia.

Pergamon, originally a mountain fortress on the Aegean coast, has become an important continental power through the careful maneuvering of its rulers, Philetaerus (282-263) and later his nephew Eumenes (263-241).

Attalus, whose mother, Antiochis, is a princess of the Seleucid house, in 241 succeeds his uncle Eumenes.

Ptolemaic Egypt controls much of southern Asia Minor and Syria, as well as some Aegean ports, by the end of the war in 241 BC.

Agis, upon his return to Sparta, finds his supporters discontented with Agesilaus' rule and disillusioned by the delay of the reforms.

Leonidas has regained power, supported by mercenaries.

Rather than engage in war with Leonidas, Agis takes sanctuary but is enticed out, summarily tried, and executed along with his mother and grandmother.

His widow is married to Cleomenes, son of Leonidas.

Agis' brother Archidamus flees to …

…Messenia.