Dodecanese relative quiet and prosperity. In 408 BC, the three cities of Rhodes had united to form one state, which built a new capital on the northern end of the island, also named "Rhodes"; this united Rhodes was to dominate the region for the coming millennia. Other islands in the Dodecanese also developed into significant economic and cultural centers; most notably, Kos served as the site of the school of medicine founded by Hippocrates. However, the Peloponnesian War had so weakened the entire Greek civilization's military strength that it lay open to invasion. In 357 BC, the islands were conquered by
Amorgos Amorgos Amorgos (, ) is the easternmost island of the Cyclades island group, and the nearest island to the neighboring Dodecanese island group in Greece. Along with several neighboring islets, the largest of which is Nikouria Island, it comprises the municipality of Amorgos, which has a land area of , and a population of 1,973 (2011 census). Due to Amorgos' position opposite the ancient beaches of Ionian towns, such as Militos, Alikarnassos and Ephesos, it became one of the first places from which the Ionians passed through to the Cyclades Islands and onto the Greek mainland. Throughout history, Amorgos was