Which was the leader of the Polynesian league Sparta of Athens?

The leader of the Polynesian League, commonly known as the Delian League, was Athens, not Sparta. After the Persian Wars, Athens emerged as the dominant naval power and led the alliance of city-states against Persia. In contrast, Sparta led the Peloponnesian League, a rival alliance. The competition between these two leagues ultimately contributed to the Peloponnesian War.