コリントス戦争
Externally, the way was paved for Theban ascendancy by the collapse of Athenian power in the Peloponnesian War (431–404 BC), through the weakening of the Spartans by their oliganthropia (demographic decline) and by the inconclusive Corinthian War (395–386 BC). Internally, the Thebans enjoyed two temporary military advantages: