Greek shipping pottery, gold, copper objects far away from their area of provenance attests to this wide-ranging network of shipping transport and trade that existed between the Greek mainland and the Greek islands . The Greeks soon came to dominate the maritime trade in the region, gradually expanding it along the shores of the Mediterranean to Egypt, Phoenicia, Asia Minor, the Black Sea, and establishing colonies. The prowess of the ancient Greek navy was primarily displayed in naval battles during the Persian wars, the Delian League era and the Peloponnesian war. In the following centuries, a large part of the sea trade
Ancient Greek phonology and this cluster underwent metathesis early in the Ancient Greek period. Metathesis is likely in this case; clusters of a voiced stop and , like , do not occur in Ancient Greek, since they change to by assimilation (see below), while clusters with the opposite order, like , pronounced , do occur. Ancient grammarians, such as Aristotle in his "Poetics" and Dionysius Thrax in his Art of Grammar, categorized letters () according to what speech sounds ( 'elements') they represented. They called the letters for vowels ('pronounceable', singular ); the letters for the nasals, liquids, and , and the letters