The lofty character of Aristides, who was now the most prominent Athenian leader, and his great reputation for fairness and incorruptible integrity, also contributed to the same result. He was chosen the first president of the league (477 B.C.), and the sacred island of Delos was made the repository of the common funds. What proportion of the ships and money needed for carrying out the purposes of the union should be contributed by the different states, was left entirely to the decision of Aristides, such was the confidence all had in his equity; and so long as he had control of the matter, none of the members of the alliance ever had cause of complaint.

Thus did Sparta lose, and Athens gain, the place of precedence among the Ionian states. The Dorian states of the Peloponnesus, in the main, still looked to Sparta as their leader and adviser. All Greece was thus divided into two great leagues, under the rival leadership of Sparta and Athens.

THE ATHENIANS CONVERT THE DELIAN LEAGUE INTO AN EMPIRE.—The Confederacy of Delos laid the basis of the imperial power of Athens. The Athenians misused their authority as leaders of the league, and gradually, during the interval between the formation of the union and the beginning of the Peloponnesian War, reduced their allies, or confederates, to the condition of tributaries and subjects.

Athens transformed the league into an empire in the following manner. The contributions assessed by Aristides upon the different members of the confederation consisted of ships and their crews for the larger states, and of money payments for the smaller ones. From the first, Athens attended to this assessment matter, and saw to it that each member of the league made its proper contribution. After a while, some of the cities preferring to make a money payment in lieu of ships, Athens accepted the commutation, and then building the ships herself, added them to her own navy. Thus the confederates disarmed themselves and armed their master.

Very soon the restraints which Athens imposed upon her allies became irksome, and they began to refuse, one after another, to pay the assessment in any form. Naxos, one of the Cyclades, was the first island to secede, as it were, from the league (466 B.C.). But Athens had no idea of admitting any such doctrine of state rights, and with her powerful navy forced the Naxians to remain within the union, and to pay an increased tribute.

What happened in the case of Naxos happened in the case of almost all the other members of the confederation. By the year 449 B.C. only three of the island members of the league still retained their independence.

Even before this date (probably about 457 B.C.) the Athenians had transferred the common treasury from Delos to Athens, and diverting the tribute from its original purpose, were beginning to spend it, not in the prosecution of war against the Barbarians, but in the execution of home enterprises, as though the treasure were their own revenue.

Thus what had been simply a voluntary confederation of sovereign and independent cities, was converted into what was practically an absolute monarchy, with the Attic democracy as the imperial master.

What made this servitude of the former allies of Athens all the more galling was the fact that they themselves had been compelled to forge the very chains which fettered them; for it was their money that had built and was maintaining the fleet by which they were kept in subjection and forced to do whatever might be the will of the Athenians.

THE LEADERSHIP OF CIMON; HIS OSTRACISM.—One of the ablest and most popular of the generals who commanded the forces of the Athenians during this same period when they were enslaving their confederates, was Cimon, the son of Miltiades. He was one of those whose spirits had been fired by the exciting events attendant upon the Persian invasion. He had acquired a certain reputation, at the time of the abandonment of Athens, by being the first to hang up his bridle in the sanctuary of the Acropolis, thus expressing his resolution to place all his confidence in the fleet, as Themistocles advised.