The Department of Defense, or the D.O.D., is heavily involved with Eureka's inventing firm Global Dynamics, and, indeed, oversees it. The Department of Defense also has a major influence on the position of the current Sheriff and Deputy post. However, they cannot truly fire a law enforcement officer in Eureka without the written consent of the mayor, as Henry Deacon establishes, with Deputy ANDY's help.


The United States Department of Defense created the town of Eureka on the site of the 1940s military base Camp Eureka.

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