History of the Peloponnesian War

When, however, they had been put in office, and held a review of the heavy-armed troops, having separated the battalions, they selected a hundred of their enemies, and of those who appeared to have joined most decidedly in the negotiations with the Athenians; and having compelled the commons to pass an open sentence upon them, on their being condemned, they put them to death, and established a thorough oligarchy in the city.

And this change of government lasted a very long time, though effected by a very few men through the triumph of a faction.