[Isto]

Know only about local history and terrain.

Crop fields are made intentionally so that defending would be more easy in the boarder. Terrain have been terraformed so that large portion of the country can be flooded in a water if enemy forces invade too deep. Large underground vaults have been built and so on.

Long history of enemy invasions for some reason, there aint even anything valuable here. Maybe just because they can.

People fear that it might happen again.

Lying in wait under the snow when fresh snow have rained on the top is hard to spot and can be done in open terrain too. Its also warmer than outside the snow. All equipment might not function and only specialized vehicles may be used.

Groups travel in lines when using ski's. The first one makes lanes for rest of them. Extremely there might be more snow than the height of a man.

Often there is snow half of a year.