Cambyses II of Persia

Cambyses II (Unknown – July 522 BCE) was emperor of the.

In around 524 BCE, Cambyses sent an army of 50,000 men in an attempt to destroy the Oracle of Amun in Siwa. The army was later buried by a sandstorm and was thought by many to have vanished.

Almost 500 hundred years later, a group of explorers discovered a site in the Isolated Desert of they believed to be the remains of Cambyses's army though they later abandoned the site due to the amount of casualties and toll taken. The site was later discovered the Medjay Bayek in around 48 BCE, overridden with hyenas.

Reference

 * Assassin's Creed: Origins