Quote from IoM-Christian on 2023-06-12, 20:58

The various Machines, Chariots, Wagons, etc. found in the Army list sections (MAC), generally can't enter or move through Difficult or Wilderness terrain and if somehow their Base enters (touch) such a terrain feature. The Unit halts, recieves 1D6 Hits with a strength of D6, and becomed Disordered.

On the other hand, in some cases what could be argued as the same sort of construction, is able to manouver in those kind of terrain types, due to Crew/Steed abilities, superior construction, magic or whatever. In such case, its noted as Special Rule: Terraintravel (x)