Sikyonia
Kleisthenes becomes tyrant of Sikyon.
Kleisthenes of Sikyon leads the First Sacred War against Phokis and destroys Kirrha.
Approximate end of the tyranny of Kleisthenes of Sikyon.
August 7
July
Sparta and their allies, including Sikyon and Tegea, defeat Athens and their allies at the Battle of Nemea. On Athens side are Thebes, Lokris Opuntii, and Corinth. With Sparta are Halieis, Sikyon, Epidauros, Troizen, and Hermione. Phlious remains neutral. Pellene fights on the side of Sparta against Thespiai.
Euphron becomes tyrant of Sikyon.
Arkadians under Aineas of Stymphalos march to Sikyon and send Euphron into flight.
Alexander, the son of Polyperchon, is assassinated in Sikyon. His wife Kratesipolis takes control of the city.
Kratesipolis wards off the army of Antigonos’ general Telesphoros from Sikyon.
Polyperchon controls much of the Peloponnese, including Corinth and Sikyon.
Demetrios Poliorketes seizes Epidauros, Sikyon, Corinth, Bura, Argos, and Orchomenos.
Demetrios Poliorketes relocates Sikyon to a more defensible location.
Antigonos II installs the tyrant Kleon at Sikyon.
Antigonos II installs the tyrant Abantidas at Sikyon.
Antigonos II installs the tyrant Paseas at Sikyon.
Antigonos II installs the tyrant Nikokles at Sikyon.
Aratos of Sikyon removes the tyrant Nikokles, who Antigonos II had installed. Antigonos II attempts to bribe Aratos but is unsuccessful.
Aratos of Sikyon takes Acrocorinth. The inhabitants of Corinth rise up against Antigonos II.
Aratos of Sikyon takes the Acrocorinth and frees Argos. Xenon steps down in Hermione.
The Spartans under King Kleomenes III defeat the Achaian League under Aratos of Sikyon (and including Argos and Megalopolis) in the Battle of Dyme.
Mantineia is sacked by Antigonos III Doson. The city is handed over to Aratos of Sikyon, who repopulates it and renames it to Antigonia.
The meeting of the Achaian assembly is transferred from Aigion to Sikyon.
A Roman army under Sulpicius Puplius and the Aetolian League ravages Sikyon before being pushed out by Philip V.
197 BCE