To bring about this battle, Themistocles used a cunning mix of subterfuge and misinformation, psychologically exploiting Xerxes's desire to finish the invasion. Xerxes's actions indicate that he was keen to finish the conquest of Greece in 480 BC, and to do this, he needed a decisive victory over the Allied fleet. Themistocles sent a servant, Sicinnus, to Xerxes, with a message proclaiming that Themistocles was "on king's side and prefers that your affairs prevail, not the Hellenes". Themistocles claimed that the Allied commanders were infighting, that the Peloponnesians were planning to evacuate that very night, and that to gain victory all the Persians needed to do was to block the straits. In performing this subterfuge, Themistocles seems to have been trying to lure the Persian fleet into the Straits. The message also had a secondary purpose, namely that in the event of an Allied defeat, the Athenians would probably receive some degree of mercy from Xerxes (having indicated their readiness to submit). At any rate, this was exactly the kind of news that Xerxes wanted to hear. Xerxes evidently took the bait, and the Persian fleet was sent out to effect the block. Perhaps overconfident and expecting no resistance, the Persian navy sailed into the Straits, only to find that, far from disintegrating, the Allied navy was ready for battle.