Editing 366 BC (section)

==== Greece ====
* [[Athens]] founds the town of [[Kos, Greece|Kos]] on the island of [[Kos]] in the [[Aegean Sea]].
* [[Thebes, Greece|Theban]] leader, [[Epaminondas]], returns to the [[Peloponnesus]] for a third time, seeking to secure the allegiance of the states of [[Achaea]]. Although no army dares to challenge him in the field, the [[Democracy|democratic governments]] he establishes there are short-lived, as pro-[[Sparta]]n aristocrats soon return to the cities, reestablish the [[oligarchies]], and bind their cities ever more closely to Sparta.
* Thebes makes peace with Sparta and then turns its attention on Athens, which is trying to revive its maritime empire and is interfering in [[Macedon]]ian dynastic quarrels.
* [[Thebes, Greece|Thebes]] captures the city of [[Oropus]].<ref>{{Cite journal |last=Shrimpton |first=G. S. |date=1971 |title=The Theban Supremacy in Fourth-Century Literature |url=https://www.jstor.org/stable/1088061 |journal=Phoenix |volume=25 |issue=4 |pages=310–318 |doi=10.2307/1088061 |issn=0031-8299}}</ref>