THE BATTLE OF ISSUS (333 B.C.).--At the northeast corner of the Mediterranean lies the plain of Issus. Here Alexander again defeated the Persian army, numbering six hundred thousand men. The family of Darius, including his mother, wife, and children, fell into the hands of Alexander; but the king himself escaped from the field, and hastened to his capital, Susa, to raise another army to oppose the march of the conqueror. SIEGE OF TYRE (332 B.C.).--Before penetrating to the heart of the empire, Alexander turned to the south, in order to effect the subjugation of Phoenicia, that he might command the Phoenician fleets and prevent their being used to sever his communication with Greece. The island-city of Tyre, after a memorable siege, was taken by means of a mole, or causeway, built with incredible labor through the sea to the city. Eight thousand of the inhabitants were slain, and thirty thousand sold into slavery--a terrible warning to those cities that should dare to close their gates against the Macedonian. ALEXANDER IN EGYPT.--With the cities of Phoenicia and the fleets of the Mediterranean subject to his control, Alexander easily effected the conquest of Egypt. The Egyptians, indeed, made no resistance to the Macedonians, but willingly exchanged masters. While in the country, Alexander founded, at one of the mouths of the Nile, a city called, after himself, Alexandria. The city became the meeting- place of the East and West; and its importance through many centuries attests the far-sighted wisdom of its founder. A less worthy enterprise of the conqueror was his expedition to the oasis of Siwah, located in the Libyan desert, where were a celebrated temple and oracle of Zeus Ammon. To gratify his own vanity, as well as to impress the superstitious barbarians, Alexander desired to be declared of celestial descent. The priests of the temple, in accordance with the wish of the king, gave out that the oracle pronounced Alexander to be the son of Zeus Ammon, and the destined ruler of the world. THE BATTLE OF ARBELA (331 B.C.).--From Egypt Alexander recommenced his march towards the Persian capital. He had received offers of peace from Darius, but to these he is said to have replied, "There cannot be two suns in the heavens." Pushing on, he crossed the Euphrates and the Tigris without opposition; but upon the plain of Arbela, not far from ancient Nineveh, he found his further advance disputed by Darius with an immense army. Again the Macedonian phalanx "cut through the ranks of the Persians as a boat cuts through the waves." The fate of Darius has been already narrated in our story of the last of the Persian kings (see p. 82). The battle of Arbela was one of the decisive combats of history. It marked the end of the long struggle between the East and the West, between Persia and Greece, and prepared the way for the spread of Hellenic civilization over all Western Asia.