|A loaded three-span Scorpion|
This is further borne out with the great siege works thrown up around Gergovia and Alesia by the Romans. Caesar completed ditches six hundred yards from his own fortifications in both cases. Perhaps it was just to slow the Gallic advance, but I suspect it was more than that. These ditches were at the outer limits of scorpion range...but you have to wonder, whose scorpions? Certainly, a deep ditch would make it difficult to wheel heavy artillery pieces into range of the Roman walls.
|A Scorpion and Onager side by side...they don't share much in common do they.|