Which ancient Greek conflict provides the historical backdrop for Assassin's Creed Odyssey?

The Peloponnesian War provides the historical backdrop for Assassin's Creed Odyssey.

The game is set in Greece during the fifth century BCE, with its main events beginning in 431 BCE. That is the year the Peloponnesian War began between the Delian League, led by Athens, and the Peloponnesian League, led by Sparta.

Players control Kassandra or Alexios, a mercenary whose journey crosses a Greece divided by the conflict. The campaign includes historical figures, political struggles, naval battles, and locations connected with both Athenian and Spartan power.

The Greco-Persian Wars occurred earlier, mainly in the fifth century BCE before the Peloponnesian War. The Macedonian Wars were later conflicts involving Rome and Macedonia, while the Punic Wars involved Rome and Carthage. These distinctions make the Peloponnesian War the specific backdrop for Odyssey.