Quote Originally Posted by Ludens
The Casse came actually quite close to uniting modern England and Wales. They also dominated tin trade with Carthage and the Atlantic seaboard. They were an important regional power. Just because we know little about them doesn't mean they were unimportant.
On the other hand, it doesn't mean they were important either! There's no evidence whatsoever that the Casse/Cassi were anything but a small tribe, or even just a sept, in the South of England at the time of Caesar.