History of the Peloponnesian War

Now when Greece was becoming more powerful, and acquiring possession of money still more than before, tyrannies, generally speaking, were established in the cities, from the revenues becoming greater; whereas before there had been hereditary kingly governments with definite privileges; and Greece began to fit out navies, and they paid more attention to the sea.

Now the Corinthians are said first to have managed naval matters most nearly to the present fashion, and triremes to have been built at Corinth first in Greece.