The Republic of RHODES was the chief maritime power in the AEgean Sea. It extended its dominion over a portion of the opposite coasts of Caria and Lycia, and over several of the neighboring islands. Like the king of Pergamus, the Rhodians had formed an alliance with Rome as a protection against Macedonia. MACEDONIA was still a powerful kingdom, governed at this time by Philip V., a monarch of considerable ability, who ascended the throne in B.C. 220, at the early age of seventeen. His dominion extended over the greater part of Greece; but two new powers had sprung up since the death of Alexander, which served as some counterpoise to the Macedonian supremacy. Of these the most important was the ACHAEAN LEAGUE, which embraced Corinth, Arcadia, and the greater part of the Peloponnesus.[36] The AETOLIAN LEAGUE included at this time a considerable portion of Central Greece. ATHENS and SPARTA still retained their independence, but with scarcely a shadow of their former greatness and power. Such was the state of the Eastern world when it came into contact with the arms of Rome. We have already seen that during the Second Punic War Philip had been engaged in hostilities with the Roman Republic. Demetrius of Pharos, who had been driven by the Romans from his Illyrian dominions,[37] had taken refuge at the court of Philip, and soon acquired unbounded influence over the mind of the young king. This wily Greek urged him to take up arms against the grasping Republic; and the ambition of Philip was still farther excited by the victories of Hannibal. After the battle of Cannae (B.C. 216) he concluded a treaty with Hannibal; but, instead of supporting the Carthaginian army and fleet, his proceedings were marked by an unaccountable degree of hesitation and delay. It was not till B.C. 214 that he appeared in the Adriatic with a fleet, and laid siege to Oricus and Apollonia, which the Romans had retained possession of at the close of the Illyrian war.[37] He succeeded in taking Oricus; but the arrival of a small Roman force, under the command of M. Valerius Laevinus, compelled him to raise the siege of Apollonia, and to burn his own ships to prevent their falling into the hands of the enemy. For the next three years the war was carried on with unaccountable slackness on both sides; but in B.C. 211 it assumed a new character in consequence of the alliance which the Romans formed with the AEtolian League. Into the details of the campaigns which followed it is unnecessary to enter; but the attention of the Romans was soon afterward directed to affairs in Spain, and the AEtolians were left almost alone to cope with Philip. The Achaeans also joined Philip against the AEtolians, and the latter people were so hard pressed that they were glad to make peace with the Macedonian king. Shortly afterward the Romans, who were desirous of turning their undivided attention to the invasion of Africa, also concluded peace with him (B.C. 205).