Dune Codexery

Shield Wall

The mountain range that shelters Arrakis's cities.

The Shield Wall is a natural mountain formation on Arrakis that protects the Imperial cities in the planet's far-northern latitudes from its violent weather. In Dune, Paul Atreides uses atomics to blast a pass through the Shield Wall, arguing that this keeps to the Great Convention because the weapons are used against a natural feature of the desert rather than against people.

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