This paper aims at examining the value of the nautike dynamis in Xenophon’s works, from Athenaion Politeia to Poroi. As already demonstrated by previous essays between 2002 and 2005, Ap was written by a young Xenophon after the events of the 411 B.C.: he positively esteems the advantages of the Athenian thalassocracy, emphasizes the relationship between sea-power and democracy and considers a government founded on the oplitai as impossible. The only limit of Athens seems to be its geographical position, as it was not an island. Xenophon’s interest in the Athenian sea-power seems to fade in the years of the Agesilaos’ campaigns and during his stay in Sicily and his exile in Scillus. However, it returns to be significant aga...