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Although heavily militarized, Cadia is largely self-sufficient, and exports huge amounts of weapons to its neighbouring planets, while importing very little. Many other worlds use Cadian materials to equip their own regiments, including the [[Brimlock Dragoons]].{{Cite This}}Cadia's earliest Kasrs had been built in the High Terra Style, with the wide streets laid out on a grid system. In early M.32, a Chaos invasion had made wretchedly short work of all the kasrs. The broad, ordered avenues had proved impossible to hold or defend. Since then the Kasrs have been built in elaborate geometric patterns, the streets jinking back and forth like the teeth of a key. From the air, Kasr Derth looked like an intricate angular puzzle. Given the Cadians' mettle and their skills at urban-war, a kasr could be held street by street, meter by meter, for months if not years.