While Cambyses was attacking Egypt , the Lacedaemonians too were making war upon Samos and upon Aeaces' son Polycrates, who had revolted and won Samos . And first, dividing the city into three parts, he gave a share in the government to his brothers Pantagnotus and Syloson; but presently he put one of them to death, banished the younger, Syloson, and so made himself lord of all Samos ; then he made a treaty with Amasis king of Egypt , sending to him and receiving from him gifts. Very soon after this, Polycrates grew to such power that he was famous in Ionia and all other Greek lands; for all his military affairs succeeded. He had a hundred fifty-oared ships, and a thousand archers. And he pillaged every place, indiscriminately; for he said that he would get more thanks if he gave a friend back what he had taken than if he never took it at all. He had taken many of the islands, and many of the mainland cities. Among others, he conquered the Lesbians; they had brought all their force to aid the Milesians, and Polycrates defeated them in a sea-fight; it was they who, being his captives, dug all the trench around the acropolis of Samos .