In the Shadow of Olympus, also known as the Pyrrhic Epochs is an alternate history timeline centered on the cyclical rise and fall of Greece as a dominant world power and its many rulers, each in some way connected to the Pyrrhic Dynasty.

Though the timeline concerns the multiple Greek epochs (see the main article on Epoch Theory), the point of divergence occurs at the start of what would later become the Fourth Epoch, following Pyrrhus' victory over the Roman legions at Asculum.

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