There is NO Mystery

 The Roman 9th Legion

Annihilation

An enduring mystery in military history, to many people, is what happened to the the Roman 9th Legion, they were fighting one month, then disappeared.

For  me, there is no mystery.

One thoery is they vanished fighting in Scotland, based on the find of an eagle standard. Not a chance of this happening. The eagle was so small it would have become invisible at around 15 paces, and Scotland was an area that the Roman fighting tactics could not be employed, plus it is too far to be supplied.

The most likely scenario is so simple, people never consider it, as the elite force, they were sent to battle first to break up any attacks. This meant they hit the opposition at its strrongest, and took the heaviest casualties. The legion probaly took so many casualties, it was disbanded, and mixed in with other legions