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After this defeat, Xerxes returned to Asia via the Hellespont, leaving part of his army in Greece under the command of Mardonius. But the following year, after having taken Athens a second time, the Persian army was defeated, in September of 479, at Platæa, near Thebes in Boeotia, in a battle that lasted 13 days, in which Mardonius was killed (Herodotus' Histories, IX, 25-85) while, at about the same time, what remained of the Persian fleet was destroyed by a Greek fleet under the command of the Spartan general Leutychides off Cape Mycale, a promontory of the Ionian coast, north of Miletus, facing the island of Samos (Herodotus' Histories, IX, 90-106). This was not the end of the war between Persia and Greece, but it was the end of the incursions of the Persian army on mainland Greece.