The negotiations between Rome and Macedonia, from the year 214, give the first striking examples of the ability and address of the Romans in foreign policy; and they are the more remarkable, as the treaty with the Aetolians and others, 211 (see above, p. 283), was the remote cause of the transactions which afterwards took place in the east. The peculiar system adopted by the Romans, of taking the lesser states under their protection as allies, must always have given them an opportunity of making war on the more powerful whenever they chose. This in fact happened in the present case, notwithstanding the peace concluded with Philip, 204. The chief object of the Romans in this war, both by sea and land, was to drive Philip completely out of Greece. The allies on both sides, and the conditions of peace, were similar to those concluded with Carthage (see above, p. 284). The destruction of the naval power of her conquered enemies became now a maxim of Roman policy in making peace; and she thus maintained the dominion of the seas without any great fleet, and without losing the essential character of a dominant power by land. 9. The expulsion of Philip from Greece brought that country into a state of dependence upon Rome; an event which could not have been better secured than by the present of liberty which T. Quintius conferred upon its inhabitants at the Isthmian games. The system of surveillance, which the Romans had already established in the west over Carthage and Numidia, was now adopted in the east over Greece and Macedonia. Roman commissioners, under the name of ambassadors, were sent into the country of the nations in alliance, and were the principal means by which this system of espionage was carried on. These however did not fail to give umbrage to the Greeks, particularly to the turbulent Aetolians; more especially as the Romans seemed in no hurry to withdraw their troops from a country which they had declared to be free. Liberty was expressly granted to the state which had taken the part of Philip, namely, to the Achaeans; to the others it was naturally understood to belong. It was nevertheless three years, 194, before the Roman army evacuated Greece and withdrew from the fortified places. The conduct of T. Quintius during this period fully shows what he was. The Greeks indeed had much want of such a guardian if they wished to remain quiet: his conduct, however, in the war against Nabis, 195, shows that he had not really at heart the tranquillity of Greece.