Aristagoras travelled to Sardis and suggested that Artaphernes attack Naxos and restore the exiles. The Persians would then gain control of the island. He explained to Artaphernes that Naxos “was a fine and fertile island, close to the Ionian coast, and rich both in treasures and slaves.” It was also the gateway to the Cyclades, which the Persians did not yet rule. Aristagoras promised that he would both fund the expedition and give Artaphernes a bonus sum. He also tempted Artaphernes by adding that capturing the island would place other poleis of the Cyclades under his control. They would serve as bases for an invasion of Euboea. After securing the permission of Susa, Artaphernes agreed and promised 200 ships.