To feed 3000 or 4000 prisoners added greatly to the difficulties, and Napoleon took a step which has been a foul blot on his reputation. They were marched into a vast square formed of French troops; as soon as all had entered the fatal square the troops opened fire upon them, and the whole were massacred. The terrible slaughter occupied a considerable time; and when their cartridge-boxes were emptied, the French soldiers had to complete the massacre with their bayonets. Of the whole of these victims one only, a mere youth, asked for mercy; the rest met their fate with heroic calmness and resolution. Napoleon's excuse for this hideous massacre was that the soldiers had broken the engagement they took at El A'rich, but this applied to only a very small proportion of the garrison, and the massacre was wholly indefensible, for if unable to feed his prisoners, they should have been allowed to depart unarmed to seek subsistence for themselves.