Battle of Mantinea
The final showdown was in 362 BC, by which time several of Boetia's former allies, such as Mantinea and Elis, had joined Sparta. Athens also fought with Sparta. The resulting Battle of Mantinea was won by Boetia and her allies but in the moment of victory, Epaminondas was killed. In the aftermath of the battle both Sparta's enemies and her allies swore a common peace. Only Sparta itself refused because it would not accept the independence of Messenia.