In 560 BC Croesus, King of Lydia in 580 BC, went to the Delphic Oracle and the Oracle at Thebes for advice. He asked if he should make war on the Persians. Both oracles gave the same response, that if Croesus crossed the river (made war on the Persians), "a mighty empire would be destroyed". They also advised him to seek out the most powerful Greek peoples and make alliance with them.