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Once a wealthy island, its timber-based economy had substantially declined by the time of the Peloponnesian War. In that conflict, it could not escape the chaos that came to engulf it. In the 5th century BCE, it was sparsely populated and was known for its diverse landscape, which included the peaks of Mount Ainos and the sands of Myrtos Beach.
Sometime in the mid-440s BCE, a young Kassandra washed up on the shore of Kephallonia. She was discovered by Markos, a passerby and resident of the island. He took her in and raised her into the legendary misthios she would become.