According to Herodotus what happened to the Lost Army of Cambyses?

The Lost Army of Cambyses is a legendary Persian army of 50,000 men.

According to the Greek historian Herodotus (c. 484 – c. 425 BC), Cambyses II (the second King of Kings of the Achaemenid Empire from 530 to 522 BC), sent an army to threaten the Oracle of Amun an ancient Egyptian diety, at the Siwa Oasis. The army of 50,000 men was halfway across the desert when a massive sandstorm buried them all in 524 BC.

Many Egyptologists regard the story as doubtful, yet people have searched unsuccessfully for the remains of the soldiers for years.

In the 1980s Gary S. Chafetz, an American journalist and author, led a six month expedition south west of the uninhabited Bahariya Oasis, approximately 100 miles south east of Siwa Oasis. Sponsored by Harvard University, The National Geographic Society, the Egyptian Geological Survey and Mining Authority, and the Ligabue Research Institute, the $250,000 expedition had at its disposal 20 Egyptian geologists and laborers, a photographer, two documentarians, three camels, an ultra-light aircraft, and ground-penetrating radar. They discovered approximately 500 tumuli (burial mounds) but no artifacts.

A team prospecting for petroleum in Egypt's Western Desert in 2000, came across fragments of textiles, bits of metal resembling weapons, and human remains that it believed to be traces of the army. The Egyptian Supreme Council of Antiquities announced that it would organize an expedition to investigate, but released no further information.