The Thirty Years Peace was a prematurely terminated treaty that had a term of 30 years, drawn between the ancient Greek cities of Athens and Sparta, in the year 446 BC. or 445 BC. The treaty ended the conflict commonly known as the First Peloponnesian War, which raged since about 460 BC.
The terms of the agreement were:
The Thirtieth Peace only lasted 13 years: in the year 432 BC. Athena Potidaea attacked, this was a listed ally but a Corinthian colony. Corinth supported his former colony. Sparta supported Corinth who had fought the Athenians on the island of Corfu in 435 BC. The issue of Potidaea and the Athenian trade sanctions against the Spartan ally Megara prompted the Spartans to declare that the Athenians had violated the treaty, thus declaring war. At this time, the Thirty Years Peace was declared void and the Second Peloponnesian War (known as the Peloponnesian War) began.
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