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
Island groups of the Philippines the same name, is the chief city of the Visayas. Mindanao's main city is Davao, towards its southeast. Island groups of the Philippines The geographical divisions of the Philippines are the three island groups of Luzon, Visayas, and Mindanao. Luzon and Mindanao are both named after the largest island in their respective groups, while the Visayas (also the "Visayan Islands") are an archipelago. Islands are organized into three distinct island group according to regions: Regions "I" to "V", "CAR", and "NCR" are for Luzon, Regions "VI" to "VIII" are for the Visayas, and Regions "IX" to "XIII" and "ARMM" are