History of the Peloponnesian War

During the night he bivouacked unobserved near the temple of Mercury, distant from Mycalessus about sixteen stades, and at day-break assaulted the town, which was not a large one, and took it; having fallen on the inhabitants whilst off their guard, and not expecting that any one would ever march up the country so far from the sea to attack them; their wall, too, being weak, and in some parts even fallen down, while in other parts it was built but low; and the gates, moreover, being open through their feeling of security.

The Thracians, then, having burst into Mycalessus, plundered both private houses and temples, and butchered the inhabitants, sparing neither old age nor youth, but killing one after another all they met with, both children and women, nay, further, even cattle and beasts of burden, and whatever other living things they saw. For the Thracian race, like the most blood-thirsty of the barbarians, is most so when secure from resistance. And thus on that occasion there was no little confusion in other respects, and every form of butchery was exhibited.

And, in particular, they attacked a boys' school, the largest there was in the place, (which the children had just entered,) and cut them all to pieces. And this disaster, which fell on the whole town, was inferior to none in extent, while it was more unexpected and shocking than any other.