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Why did Athens and Sparta go to war?

Answer:

Peloponnesian War

"The Spartans voted that the treaty had been broken, and that war must be declared, not so much because they were persuaded by the arguments of the allies, as because they feared the growth of the power of the Athenians, seeing most of Hellas already subject to them" Book One, Chapter 88 Landmark Thucydides
The two city-states of Athens and Sparta were engaged in an ongoing debate involving commercial interests .
Contributor: Bob
First answer by ID0083045961. Last edit by Bob Colella. Contributor trust: 1 [recommend contributor recommended]. Question popularity: 12 [recommend question].