Comments by "mombaassa" (@mombaassa) on "When 50,000 Soldiers Vanished: What Happened to the Lost Army of Cambyses? | Four Competing Theories" video.
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If an entire group is lost/die in an expedition, then there is no one to report the details. So, we won't know, if more than one calamity befell them. For example, hostile forces may have attacked them, their water/food supply was contaminated, an epidemic broke out...etc. Such events and a sandstorm, are not mutually exclusive.
A large army may cope with such a set back, but two or more catastrophes, perhaps not. Indeed, one event, may precipitate another. An army weakened by disease or a sandstorm, is more likely to be targeted by other parties.
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