What were the causes of this depression, from which Babylon suffered at almost regular intervals, as though stricken with some periodic malady? The main reason soon becomes apparent if we consider the nature of the country and the material conditions of its existence. Chaldæa was neither extensive enough nor sufficiently populous to afford a solid basis for the ambition of her princes. Since nearly every man capable of bearing arms was enrolled in the army, the Chaktean kings had no difficulty in raising, at a moment’s notice, a force which could be employed to repel an invasion, or make a sudden attack on some distant territory; it was in schemes which required prolonged and sustained effort that they felt the drawbacks of their position. In that age of hand-to-hand combats, the mortality in battle was very high, forced marches through forests and across mountains entailed a heavy loss of men, and three or four consecutive campaigns against a stubborn foe soon reduced an army to a condition of dangerous weakness. Recruits might be obtained to fill the earlier vacancies in the ranks, but they soon grew fewer and fewer if time was not given for recovery after the opening victories in the struggle, and the supply eventually ceased if operations were carried on beyond a certain period. The total duration of the dynasty was, according to the Royal Canon, 72 years 6 months. Peiser has shown that this is a mistake, and he proposes to correct it to 132 years 6 months, and this is accepted by most Assyri-ologists.