I'm sure I don't remember that, but let's have a look... the search terms would be Berber blue eye horsemen.... the only search hit (using the modifier site:freerepublic.com) yields a topic on the so-called Sea Peoples that largely contained nonsense (and was of course something I didn't post, he bragged).
The Vandals were Germanic and overran the Romans in modern Tunisia & Algeria - they held that area for centuries until Carthage fell (again), this time to the Saracens.
Could that be related?