In the mean time, as the siege advanced, the parties became more and more incensed against each other. They treated the captives which they took on either side with greater and greater cruelty, each thinking that they were only retaliating worse injuries from the other. The Macedonians approached nearer and nearer. The resources of the unhappy city were gradually cut off and its strength worn away. The engines approached nearer and nearer to the walls, until the battering rams bore directly upon them, and breaches began to be made. At length one great breach on the southern side was found to be "practicable," as they call it. Alexander began to prepare for the final assault, and the Tyrians saw before them the horrible prospect of being taken by storm.