In the meantime the Romans had collected a fleet of eighty ships, and with these they fought one hundred ships of their opponent off the coast of Ionia; the victory of the former was decisive, all the ships of Antiochus being captured or destroyed. This disaster, in connection with a signal defeat he sustained by land, compelled him to submit; and the Romans, always attentive to their maritime interests, which however they had not hitherto pushed nearly to the extent which they might have done, refused to grant him peace, except on the conditions, that he should cede all that part of Asia which lies between the sea and Mount Taurus; that he should give up all his vessels except ten; and that these should not, on any account, sail beyond the promontories of Cilicia. The Romans, extremely strict, and even severe, in enforcing the conditions of peace, not only destroyed fifty covered galleys, but, the successor of Antiochus having built additional vessels to the ten he was by treaty allowed to keep, they compelled him to burn them.
The temporary success of the Carthaginians against the Romans induced Philip, king of Macedon, to engage in that war which proved his ruin. The advice of Hannibal, when an exile at the court of Antiochus, likewise led to the disastrous war of that monarch with the same people; and by the advice of Hannibal also, Prusias, king of Bythinia, was engaged in hostilities with them. This king seems to have paid considerable attention to naval and commercial affairs, for both of which, indeed, his territories were admirably suited. In conjunction with the Rhodians, he made war against the inhabitants of Byzantium, and obliged them to remit the tax which they had been accustomed to levy on all vessels that sailed to or from the Euxine Sea, The maritime war between this sovereign and the Romans, who were at this time in alliance with Eumenes, king of Pergamus, offers nothing deserving our notice, except a stratagem executed by Hannibal. In order to compensate for the inferiority of Prusias' fleet, Hannibal ordered a great many serpents to be collected; these were put into pots, which, during the engagement, were thrown into the enemy's ships. The alarm and consternation occasioned by this novel and unexpected mode of warfare, threw his opponents into disorder, and compelled them to save themselves by flight.
The conquest of all the islands on the coast of Greece, from Epirus to Cape Malea, by the Romans, was the result of a naval war, in which they engaged with the Etolians, a people who, at this time, were so powerful at sea, and so much addicted to piracy, as to have drawn upon themselves the jealousy and the vengeance of the Romans. This extension of their dominions was followed by a successful war with the Istrians, which made them masters of all the western parts of the Mediterranean Sea; and by an equally successful war with Nabis, the tyrant of Sparta, who was compelled to deliver up his fleet to them, as well as all the sea-ports of consequence on the coast of Sparta.
The Rhodians hitherto had been generally in alliance with the Romans; but differences arose between them during the war between the latter and Perseus, king of Macedon.
The island of Rhodes was remarkably well situated for maritime commerce; and its inhabitants did not fail to reap all the advantages in this respect which nature had so kindly bestowed on them. It appears from Homer, that in his time there were three cities in the island; but during the Peloponnesian war, the greater part of the inhabitants, having formed the resolution to settle in one place, built the city of Rhodes, after the designs of the same Athenian architect, who built the Piræus. This city was situated on the east coast of the island, at the foot of a hill, in the form of an amphitheatre: it possessed a very convenient and safe harbour, at the entrance of which there were two rocks; and on these, which were fifty feet asunder, the famous Colossus was placed. The arsenals of Rhodes were filled with every thing requisite for the defence of the city, or the equipment of a large fleet: its walls, which were extremely high, were defended by towers: its houses were built of stone: in short, the whole city presented a striking picture of wealth, magnificence, and beauty, for which it was not less indebted to art and commerce than to nature.
Before the era of the Olympiads, the Rhodians applied themselves to maritime affairs: for many years they seem to have been masters of the Mediterranean Sea; and their code of maritime laws became the standard with all the maritime nations of antiquity, by which all controversies regarding maritime affairs were regulated. There is great doubt among the learned, whether what still exist as the fragments of these laws are genuine: we know, however, that the Romans had a law which they called Lex Rhodia; according to some, this contained the regulations of the Rhodians concerning naval affairs; according to others, however, only one clause of the law, de jactu, about throwing goods overboard in a storm, was borrowed from the Rhodians.
Besides the commerce in which they themselves were engaged, the constant arrival of ships from Egypt to Greece, and from Greece to Egypt, the island being situated exactly in the passage between these countries, contributed much to their wealth. As this encreased, they formed settlements and colonies in many places; at Parthenope and Salapia, in Italy; Agrigentum and Geta, in Sicily; Rhodes, on the coast of Spain, near the foot of the Pyrenees, &c. They were particularly celebrated for and attentive to the construction of their vessels; aiming principally at lightness and speed, the discipline observed on board of them, and the skill and ability of their captains and pilots. All these things were under the direct management and controul of magistrates, appointed for the express purpose, who were excessively attentive and even rigid in the execution of their duty. Whoever entered certain places in the arsenals without permission, was punished with death.
A few of the most remarkable events in the maritime history of Rhodes, prior to their dispute with the Romans, call for some general and cursory notice. Till the foundation of the city of Rhodes, which, as we have already stated, took place during the Peleponnesian war, there is scarcely any thing to attract our attention: a short time before this, the republican form of government was established, and the trade and navigation of the Rhodians seem to have acquired a fresh impulse and spirit. But their enterprizes were soon checked by Artemisia, queen of Caria, gaining possession of their city: this she effected by a stratagem. The Rhodians invaded Caria with a design of gaining possession of Halicarnassus: by the direction of the queen, the inhabitants made a signal that they surrendered; the Rhodians suspecting no treachery, and delighted with their apparent success, left their fleet to take possession of the town; in the meantime, the queen brought her fleet from an adjoining creek, by means of some canal or other inland communication, to the port where the Rhodian vessels lay, and quietly took them. This disaster was the cause of another, still more calamitous to the Rhodians; for Artemisia sailed with the Rhodian ships to Rhodes, and the inhabitants, under the belief that their fleet was returning victorious, permitted the enemy to land and to seize the city. To what cause the Rhodions were indebted for the restoration of their liberty and independence we are not informed; but it was owing, either to the interference of the Athenians, or the death of Artemisia.
From the period of these events, which occurred about 350 years before Christ, till the reign of Alexander the Great, the Rhodians enjoyed profound and uninterrupted tranquillity; their commerce extended, and their wealth encreased. To this conqueror they offered no resistance, but of their own accord surrendered their cities and harbours; as soon, however, as they learnt that he was dead, they resumed their independence. About this time the greater part of their city was destroyed by a dreadful inundation, which would have swept the whole of it away, if the wall between it and the sea had not been broken down by the force of the waters, and thus given them free passage. This misfortune seems only to have encouraged the inhabitants to attend still more closely and diligently to commerce, which they carried on with so much industry and skill, and in such a profitable manner, that they soon rebuilt their city, and repaired all the losses they had sustained. Their alliance was courted by all their neighbours; but they resolved to adhere to a strict neutrality, and thus, while war raged among other nations, they were enabled to profit by that very circumstance, and thus became one of the most opulent states of all Asia. Their commerce, as well as that of all the states on the Mediterranean, being much molested and injured by the pirates, they undertook, of their own accord, and at their own expence, to root them out; and in this they completely succeeded.
But that commerce, on account of which they were so very anxious to keep at peace, involved them in war. Their most lucrative trade was with Egypt. When hostilities began between Ptolemy and Antigonus, the latter insisted that they should join him; this they refused to do; upon which his fleet blockaded Rhodes, to prevent their commerce with Egypt. The Rhodians were thus compelled to act against him in their own defence, in order to free their harbour. The raising of the blockade, and the defeat of his fleet, incensed Antiochus; and to the remonstrances and entreaties of the Rhodians to be permitted to remain at peace, he replied, "that they must declare war against Ptolemy, admit his fleet into their harbour, and give hostages for the performance of these articles." War now was inevitable, and great preparations for it were made on both sides: the attack on the city was committed by Antigonus to his son Demetrius; for this purpose he collected a fleet of 200 ships of war, 170 transports with 40,000 men on board, and 1000 vessels laden with provisions, stores, warlike engines, etc. This immense armament was composed partly of pirates and mercenaries, who were induced to join Demetrius, by the hope of partaking in the plunder of Rhodes. It is foreign to our purpose to enter on the details of this memorable siege: the Rhodians trusted principally to their own valour and resources; from Ptolemy, however, they received most ample and seasonable supplies of provisions: at one time he sent them 300,000 measures of corn; a few days afterwards Cassandra sent them 100,000 bushels of barley, and Lysimachus 400,000 bushels of corn, and as many of barley: these supplies, the valour of the inhabitants, and the ill success of some new and immense engines, on which Demetrius had mainly depended, at length induced him to raise the siege and make peace with the Rhodians.