Athenians, Naxians, and Eretrians for their interference in the Ionian Revolt, the burning of Sardis, and their victory over the Persians at Marathon. From 483 BC, Xerxes prepared his expedition: The Xerxes Canal was dug through the isthmus of the peninsula of Mount Athos, provisions were stored in the stations on the road through Thrace, and two pontoon bridges later known as Xerxes' Pontoon Bridges were built across the Hellespont. Soldiers of many nationalities served in the armies of Xerxes from all over his multi-ethnic massive Eurasian-sized empire and beyond, including the Assyrians, Phoenicians, Babylonians, Egyptians, Jews, Macedonians, European Thracians, Paeonians, Achaean Greeks, Ionians, Aegean islanders, Aeolians, Greeks from Pontus, Colchians, Indians and many more. According to the Greek historian Herodotus, Xerxes's first attempt to bridge the Hellespont ended in failure when a storm destroyed the flax and papyrus cables of the bridges. In retaliation, Xerxes ordered the Hellespont (the strait itself) whipped three hundred times, and had fetters thrown into the water. Xerxes's second attempt to bridge the Hellespont was successful. The Carthaginian invasion of Sicily deprived Greece of the support of the powerful monarchs of Syracuse and Agrigentum; ancient sources assume Xerxes was responsible, modern scholarship is skeptical. Many smaller Greek states, moreover, took the side of the Persians, especially Thessaly, Thebes and Argos. Xerxes was victorious during the initial battles. Xerxes set out in the spring of 480 BC from Sardis with a fleet and army which Herodotus estimated was roughly one million strong along with 10,000 elite warriors named the Immortals. More recent estimates place the Persian force at around 60,000 combatants. Battle of Thermopylae and destruction of Athens At the Battle of Thermopylae, a small force of Greek warriors led by King Leonidas of Sparta resisted the much larger Persian forces, but were ultimately defeated. According to Herodotus, the Persians broke the Spartan phalanx after a Greek man called Ephialtes betrayed his country by telling the Persians of another pass around the mountains. At Artemisium, large storms had destroyed ships from the Greek side and so the battle stopped prematurely as the Greeks received news of the defeat at Thermopylae and retreated. After Thermopylae, Athens was captured. Most of the Athenians had abandoned the city and fled to the island of Salamis before Xerxes arrived. A small group attempted to defend the Athenian Acropolis, but they were defeated. Xerxes ordered the Destruction of Athens and