With the intuitive decision of a great commander, Demosthenes at once saw that the possession of Epipolae was the key to the possession of Syracuse, and he resolved to make a prompt and vigorous attempt to recover that position, while his force was unimpaired, and the consternation which its arrival had produced among the besieged remained unabated. The Syracusans and their allies had run out an outwork along Epipolae from the city walls, intersecting the fortified lines of circumvallation which Nicias had commenced, but from which they had been driven by Gylippus. Could Demosthenes succeed in storming this outwork, and in re-establishing the Athenian troops on the high ground, he might fairly hope to be able to resume the circumvallation of the city, and become the conqueror of Syracuse: for, when once the besiegers' lines were completed, the number of the troops with which Gylippus had garrisoned the place would only tend to exhaust the stores of provisions, and accelerate its downfall.
An easily-repelled attack was first made on the outwork in the day-time, probably more with the view of blinding the besieged to the nature of the main operations than with any expectation of succeeding in an open assault, with every disadvantage of the ground to contend against. But, when the darkness had set in, Demosthenes formed his men in columns, each soldier taking with him five days' provisions, and the engineers and workmen of the camp following the troops with their tools, and all portable implements of fortification, so as at once to secure any advantage of ground that the army might gain. Thus equipped and prepared, he led his men along by the foot of the southern flank of Epipolae, in a direction towards the interior of the island, till he came immediately below the narrow ridge that forms the extremity of the high ground looking westward. He then wheeled his vanguard to the right, sent them rapidly up the paths that wind along the face of the cliff, and succeeded in completely surprising the Syracusan outposts, and in placing his troops fairly on the extreme summit of the all-important Epipolae. Thence the Athenians marched eagerly down the slope towards the town, routing some Syracusan detachments that were quartered in their way, and vigorously assailing the unprotected part of the outwork. All at first favoured them. The outwork was abandoned by its garrison, and the Athenian engineers began to dismantle it. In vain Gylippus brought up fresh troops to check the assault: the Athenians broke and drove them back, and continued to press hotly forward, in the full confidence of victory. But, amid the general consternation of the Syracusans and their confederates, one body of infantry stood firm. This was a brigade of their Boeotian allies, which was posted low down the slope of Epipolae, outside the city walls. Coolly and steadily the Boeotian infantry formed their line, and, undismayed by the current of flight around them, advanced against the advancing Athenians. This was the crisis of the battle. But the Athenian van was disorganized by its own previous successes; and, yielding to the unexpected charge thus made on it by troops in perfect order, and of the most obstinate courage, it was driven back in confusion upon the other divisions of the army that still continued to press forward. When once the tide was thus turned, the Syracusans passed rapidly from the extreme of panic to the extreme of vengeful daring, and with all their forces they now fiercely assailed the embarrassed and receding Athenians. In vain did the officers of the latter strive to re-form their line. Amid the din and the shouting of the fight, and the confusion inseparable upon a night engagement, especially one where many thousand combatants were pent and whirled together in a narrow and uneven area, the necessary manoeuvres were impracticable; and though many companies still fought on desperately, wherever the moonlight showed them the semblance of a foe, [THUC. vii. 44. Compare Tacitus's description of the night engagement in the civil war between Vespasian and Vitellius: "Neutro inclinaverat fortuna, donec adulta nocte, LUNA OSTENDERET ACIES, FALERESQUE."—Hist. Lib. iii. sec. 23.] they fought without concert or subordination; and not unfrequently, amid the deadly chaos, Athenian troops assailed each other. Keeping their ranks close, the Syracusans and their allies pressed on against the disorganized masses of the besiegers; and at length drove them, with heavy slaughter, over the cliffs, which, scarce an hour before, they had scaled full of hope, and apparently certain of success.
This defeat was decisive of the event of the siege. The Athenians afterwards struggled only to protect themselves from the vengeance which the Syracusans sought to wreak in the complete destruction of their invaders. Never, however, was vengeance more complete and terrible. A series of sea-fights followed, in which the Athenian galleys were utterly destroyed or captured. The mariners and soldiers who escaped death in disastrous engagements, and in a vain: attempt to force a retreat into the interior of the island, became prisoners of war. Nicias and Demosthenes were put to death in cold blood; and their men either perished miserably in the Syracusan dungeons, or were sold into slavery to the very persons whom, in their pride of power, they had crossed the seas to enslave.
All danger from Athens to the independent nations of the West was now for ever at an end. She, indeed, continued to struggle against her combined enemies and revolted allies with unparalleled gallantry; and many more years of varying warfare passed away before she surrendered to their arms. But no success in subsequent conquests could ever have restored her to the pre-eminence in enterprise, resources, and maritime skill which she had acquired before her fatal reverses in Sicily. Nor among the rival Greek republics, whom her own rashness aided to crush her, was there any capable of reorganizing her empire, or resuming her schemes of conquest. The dominion of Western Europe was left for Rome and Carthage to dispute two centuries later, in conflicts still more terrible, and with even higher displays of military daring and genius, than Athens had witnessed either in her rise, her meridian, or her fall.
SYNOPSIS OF THE EVENTS BETWEEN THE DEFEAT OF THE ATHENIANS AT SYRACUSE, AND THE BATTLE OF ARBELA.
412 B.C. Many of the subject allies of Athens revolt from her, on her disasters before Syracuse being known; the seat of war is transferred to the Hellespont and eastern side of the AEgean.
410. The Carthaginians attempt to make conquests in Sicily.
407. Cyrus the Younger is sent by the king of Persia to take the government of all the maritime parts of Asia Minor, and with orders to help the Lacedaemonian fleet against the Athenian.
406. Agrigentum taken by the Carthaginians.
405. The last Athenian fleet destroyed by Lysander at AEgospotamos. Athens closely besieged. Rise of the power of Dionysius at Syracuse.