The Thirty Years' Peace was first tested in 440 BC, when Athens's powerful ally, Samos, rebelled from its alliance with Athens. The rebels quickly secured the support of a Persian satrap, and Athens found itself faced the prospect of revolts throughout its empire. If the Spartans intervened at that moment, they would be able to crush the Athenians, who were in a vulnerable situation, but when the Spartans called a convention to discuss whether or not they should go to war, it decided not to go to war. The Corinthians were notable for opposing the war with the Athenians.