Origins of Caesar\'s 10th legion

[D B Campbell]

It is generally accepted that legio X was founded by Caesar in around 60 BC in Spain.

The point is surely that, if Caesar found Legion X in Gaul when he arrived, it's because it had been serving there under Pomptinus, and had probably been raised by him.

Whatever legions Caesar had in Spain probably remained there, unless they were disbanded.

I can't see any reason to suppose that Legion X had been raised in Spain and had somehow followed Caesar to Gaul. Can you? :?