Peloponnesian War

noun
1.
a war between Athens and Sparta, 431–404 b.c., that resulted in the transfer of hegemony in Greece from Athens to Sparta.
British Dictionary definitions for Peloponnesian War

Peloponnesian War

noun
1.
a war fought for supremacy in Greece from 431 to 404 bc, in which Athens and her allies were defeated by the league centred on Sparta
Peloponnesian War in Culture
Peloponnesian War [(pel-uh-puh-nee-zhuhn, pel-uh-puh-nee-shuhn)]

A long war between the Greek city-states of Athens and Sparta in the fifth century b.c. Sparta won the war.

Note: The historian Thucydides fought in the Peloponnesian War and later wrote a remarkable history about it.