Rising tensions between the Peloponnesian League led by Sparta and the Athenian Empire which was pushing them too far in Athens' over-aggresive policies.
Athens, having turned the alliance against the Persian Empire into an empire of its own, interfered in the other cities to extend its influence. The Peloponnesian League led by Sparta, some of whose members were targeted by Athens, gave an ultimatum for this interference to cease. Athens persisted and war ensued.
The Spartans won the Peloponnesian war, the only war between the Athenians and the Spartans.
We today call it the Peloponnesian War as it was mainly city-states from the Peloponnesian peninsula which opposed Athens and its empire.
It lost.
If you are talking about what we usually call the Peloponnesian War 431 to 404 BCE, Sparta led the Peloponnesian League which defeated the Athenian Empire in that war.
Sparta's declaration of war against Athens began the Peloponnesian war. Sparta accused Athens of breaking their peace and the war began in 431 BCE.
A contest between the Athenian empire and the Peloponnesian League led by Sparta, with Athenian expansionism facing Peloponnesian determination to give no further ground to it.
The Peloponnesian War was caused by Athens slowly creating an empire under Pericles, an Athenian general. Sparta did not want only one city-state to be able to control all of Greece, so they decided to attack Athens, causing the Peloponnesian War.
Athens imposed a trading ban on Megara, a member of the Peloponnesian League, designed to ruin it. Megara had the League demand its raising, and when Athens refused war broke out.
Presumably an analyis of the Peloponnesian War. Who did it?
Peloponnesian War happened in -431.
History of the Peloponnesian War.
. . . the Peloponnesian War .
The Peloponnesian war
Led the Peloponnesian League.
Athens won the first Peloponnesian War but Sparta won the second war
some important events of the Peloponnesian War
Athens and Sparta fought in the Peloponnesian War.