From 478 BCE until 404 BCE, a collection of Greek city-states were united under the leadership of Athens. Beyond inscriptions and a few minor sources, there is very little to tell us about life within this empire … that is, except the works of Thucydides, an Athenian historian and general who wrote a history of the Peloponnesian War. Professor Polly Low from Durham University spoke to Tristan about what we can learn from Thucydides work about this Athenian empire. How did Athens come to have this power? How did they keep their subjects in line? What did Thucydides miss out?