The Battle of Pharos was a naval battle between the Greek colony Pharos allied with Dionysius the Elder of Syracuse and the Illyrian Liburnians, which took place in 383/4 BC. The Illyrians of Zadar, the Iadasinoi, became allies of the natives of Hvar and the leaders of an eastern Adriatic coast coalition in the fight against the Greek colonizers. An expedition of 10,000 men in 300 ships sailed out from Zadar and laid siege to the Greek colony Pharos in the island of Hvar, but the Syracusan fleet of Dionysius was alerted and attacked the siege fleet. The naval victory went to the Greeks which allowed them relatively safer further colonization in the southern Adriatic.