When charging, units entirely made of models with the Swiftstride special rule and Movement 7 or higher roll 3D6, discard the lowest result, and add the result to their Movement value. When fleeing or pursuing, they roll 3D6, and discard the lowest result.
When charging, units entirely made of models with the Swiftstride special rule and Movement 6 or lower roll 2D6, and add the result to their Movement value. When fleeing or pursuing, they roll 2D6.