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Dahlgren

Rear Admiral John A. Dahlgren (1809-1870) was a U.S. Navy officer noted for the weapons he designed.

Several places in the United States are named for him, including:

Dahlgren, Illinois
Dahlgren, Virginia, and the U.S. Naval base there, which was originally used for testing guns but is now more involved in the Space Program
Dahlgren Hall at the U.S. Naval Academy in Annapolis, Maryland

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