Assassin's Creed Odyssey takes place mainly during which ancient conflict?

Assassin's Creed Odyssey takes place mainly during the Peloponnesian War.

The game is set in ancient Greece and begins in 431 BCE, the opening year of the war between Athens and Sparta. Players control a mercenary who becomes involved in political, military, and family conflicts spanning the Greek world.

The Peloponnesian War lasted from 431 to 404 BCE, although the game uses historical events and fictional characters together rather than attempting to reproduce every campaign exactly. Athens and Sparta are central to its political landscape, and the player can support either side in many conquest battles.

Odyssey is sometimes mistaken for a story about the Persian Wars because it includes earlier Greek history, including the Battle of Thermopylae in its opening sequence. That prologue occurs decades before the main campaign. The game was released in 2018 and is set before the origins-focused events of Assassin's Creed Origins.