A hedgehog is an anti-vehicle fortification, primarily intended to stop tanks. Hedgehogs are concrete or metal structures which cannot easily be crushed or pushed aside. Driving a vehicle of any kind into one would cause a high risk of immobilization.

In CMBN, hedgehogs are impassable to vehicles. Infantry may freely occupy the square, and hedgehogs provide some cover. Hedgehogs are indestructible even with demo charges.

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