When the Babylonians heard all this, and saw the dreadful condition in which Zopyrus was, they gave him the command of as many troops as he desired. With these he made a sally, and cut off more than a thousand of the enemy: Darius having previously concerted with him. In a few days he made another sally, when he cut off double the number. In a third he destroyed not less than four thousand. "Nothing," say the historians, "was now talked of but the condition and success of Zopyrus." This was, indeed, so much the case, that he was at length appointed commander-in-chief. The whole matter, as we have stated before, was a stratagem between Zopyrus and Darius. Now, then, as Zopyrus had become master of the forces, he sent intelligence to the king. The king approached with his army. Zopyrus opened the gates, and the city was delivered into the king's hands. No sooner did Darius find himself master of the town, than he ordered its hundred gates to be pulled down, and its walls to be partly demolished[116]: but, in order to keep up the population, he caused fifty thousand women to be brought from the several provinces of his empire to supply the place of those the inhabitants had so cruelly destroyed at the beginning of the siege; and for having perpetrated that horrific act, he caused three thousand of the most distinguished of the nobility to be crucified[117]. Babylon remained in the possession of the kings of Persia for several generations[118]. But it soon ceased to be a royal residence, the sovereigns having chosen to reside either at Shusan, Ecbatana, or Persepolis; and, the better to reduce it to ruin, they built Seleucia in its neighbourhood, and caused the chief portion of its inhabitants to remove to Ctesiphon.