Towards the end of the conflict with Persia, the process by which the Delian League became the Athenian Empire reached its conclusion. The allies of Athens were not released from their obligations to provide either money or ships, despite the cessation of hostilities. In Greece, the First Peloponnesian War between the power-blocs of Athens and Sparta, which had continued on/off since 460 BC, finally ended in 445 BC, with the agreement of a thirty-year truce. However, the growing enmity between Sparta and Athens would lead, just 14 years later, into the outbreak of the Second Peloponnesian War. This disastrous conflict, which dragged on for 27 years, would eventually result in the utter destruction of Athenian power, the dismemberment of the Athenian empire, and the establishment of a Spartan hegemony over Greece. However, not just Athens suffered—the conflict would significantly weaken the whole of Greece.