The neighbourhood in which the Assyrian army suffered this great disaster[67] was notorious in antiquity for its power of pestilence. Making every allowance for the untutored imagination of the ancients, we must admit the Serbonian bog, between Syria and Egypt, to have been a place terrible for filth and miasma. The noxious vapours travelled far; but the plagues, with which this swamp several times desolated the world, were first engendered among the diseased and demoralised populations, whose villages festered upon its margin. A Persian army was decimated here in the middle of the fourth century before Christ. "The fatal disease which depopulated the earth in the time of Justinian and his successors first appeared in the neighbourhood of Pelusium, between the Serbonian bog and the eastern channel of the Nile."[68] To the north of the bog the Crusaders also suffered from the infection. It is, therefore, very probable that the moral terror of this notorious neighbourhood, as well as its malaria, acting upon an exhausted and disappointed army in a devastated land, was the secondary cause in the great disaster, by which the Almighty humbled the arrogance of Asshur. The swiftness, with which Sennacherib's retreat is said to have begun, has been equalled by the turning-points of other historical campaigns. Alexander the Great's decision to withdraw from India was, after victories as many as Sennacherib's, made in three days. Attila vanished out of Italy as suddenly as Sennacherib, and from a motive less evident. In the famous War of the Fosse the Meccan army broke off from their siege of Mohammed in a single stormy night. Napoleon's career went back upon itself with just as sharp a bend no less than thrice--in 1799, on Sennacherib's own ground in Syria; in 1808, in Spain; and in 1812, when he turned from Moscow upon "one memorable night of frost, in which twenty thousand horses perished, and the strength of the French army was utterly broken."[69]
[67] The statement of the Egyptian legend, that it was from a point in the neighbourhood of Pelusium that Sennacherib's army commenced its retreat, is not contradicted by anything in the Jewish records, which leave the locality of the disaster very vague, but, on the contrary, receives some support from what Isaiah expresses as at least the intention of Sennacherib (chap. xxxvii. 25).
[68] Gibbon, _Decline and Fall_, xliii.
[69] Arnold, _Lectures on Modern History_, 177, quoted by Stanley.
The amount of the Assyrian loss is enormous, and implies of course a much higher figure for the army which was vast enough to suffer it; but here are some instances for comparison. In the early German invasions of Italy whole armies and camps were swept away by the pestilential climate. The losses of the First Crusade were over three hundred thousand. The soldiers of the Third Crusade, upon the scene of Sennacherib's war, were reckoned at more than half a million, and their losses by disease alone at over one hundred thousand.[70] The Grand Army of Napoleon entered Russia two hundred and fifty thousand, but came out, having suffered no decisive defeat, only twelve thousand; on the retreat from Moscow alone ninety thousand perished.
[70] Gibbon, xlii.; lix.
What we are concerned with, however, is neither the immediate occasion nor the exact amount of Sennacherib's loss, but the bare fact, so certainly established, that, having devastated Judah to the very walls of Jerusalem, the Assyrian was compelled by some calamity apart from human war to withdraw before the sacred city itself was taken. For this was the essential part of Isaiah's prediction; upon this he had staked the credit of the pure monotheism, whose prophet he was to the world. If we keep before us these two simple certainties about the great Deliverance: _first_, that it had been foretold by Jehovah's word, and _second_, that it had been now achieved, despite all human probability, by Jehovah's own arm, we shall understand the enormous spiritual impression which it left upon Israel. The religion of the one supreme God, supreme in might because supreme in righteousness, received a most emphatic historical vindication, a signal and glorious triumph. Well might Isaiah exclaim, on the morning of the night during which that Assyrian host had drifted away from Jerusalem, _Jehovah is our Judge_; _Jehovah is our Lawgiver_; _Jehovah is our King_: _He saveth us_. No other god for the present had any chance in Judah. Idolatry was discredited, not by the political victory of a puritan faction, not even by the distinctive genius or valour of a nation, but by an evident act of Providence, to which no human aid had been contributory. It was nothing less than the baptism of Israel in spiritual religion, the grace of which was never wholly undone.