(Thanks to Castelviator for this idea)

If your company is known for its actions in war zones with a specific type of terrain (jungles, swamps, desert, polar areas, volcanic terrain...), you can choose this movement instead of one of the ones on your company sheet when you get an advance:

EXPERTS IN DANGEROUS TERRAIN [choose one : Jungle, Desert, Ice, Swamps, Mountains, Subterranean, Submarine, Void, Volcanic, Toxic.]

When you manoeuver or fight in the chosen terrain you are specialised, explain how you use as an edge to have Advantage in your rolls. Your officers can always give you an idea of the potential threats in an area of that type.