Difficult Ground. Vehicles that move through difficult terrain are not slowed down like infantry – they will either crash through successfully or become stuck, bogged down or something similar. To represent this a vehicle that moves into difficult terrain or starts its move in difficult terrain must take a Difficult Terrain test. Do this by rolling a D6. On a roll of 1 the vehicle is immobilised for the rest of the game, on a 2-6 it can carry on moving.
Two vehicle types have their own variants of this test: Skimmers and Walkers.
Diagram: Difficult Terrain Test. A vehicle moving through ruined terrain rolls a D6: a result shown as "CRASH!!" with the vehicle destroyed/wrecked, or "IMMOBILISED!" with a die showing a 1, illustrating the outcome of a failed Difficult Terrain test.