History of the Cyclades hoped to control the entire archipelago after taking this island. On the way there, Aristagoras quarreled with the admiral Megabetes, who betrayed the force by informing Naxos of the fleet's approach. The Persians temporarily renounced their ambitions in the Cyclades due to the Ionian revolt. When Darius launched his expedition against Greece, he ordered Datis and Artaphernes to take the Cyclades. They sacked Naxos, Delos was spared for religious reasons while Sifnos, Serifos and Milos preferred to submit and give up hostages. Thus the islands passed under Persian control. After Marathon, Miltiades set out to reconquer the archipelago, but he
History of the Cyclades Empire, which retained them until the 13th century. At first, administrative organisation was based on small provinces. During the rule of Justinian I, the Cyclades, Cyprus and Caria, together with Moesia Secunda (present-day northern Bulgaria) and Scythia Minor (Dobruja), were brought together under the authority of the "quaestura exercitus" set up at Odessus (now Varna). Little by little, themes were put into place, starting with the reign of Heraclius at the beginning of the 7th century. In the 10th century the theme of the Aegean Sea was established; it included the Cyclades, the Sporades, Chios, Lesbos and Lemnos. In fact,