The Lost Army of Cambyses

 http://blog.theexplorerschool.com/2008/01/25/the-lost-army-of-cambyses/

In 2000 Helwan university geology department found arrow and spear remains in the Great Sand Sea. Excited by this various archeologists and geologists including Gail McKinnon and Tom Brown have searched for Cambyses army and found little apart from what are almost certainly Roman army remains. Brown has plotted a possible route but has downgraded the army to a more likely 10,000. The hunt continues.