Answer:
The history of the legion is unclear, since no clear date of its establishment is stated in historical documents. When he became governor of Cisalpine, Gaul, in 58 BCE, Julius Caesar inherited this legion along with others. In 43 BCE, during the Roman conquest, the IX Legion was stationed in Britain. Shortly after 108 CE, the legion was wiped out in action in Northern Britain, perhaps during an upsurge of northern tribes against Roman rule. It is still a mystery as to how the ninth legion came to its end.
