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'''Battery Langdon''' was completed in 1923 and mounted two 12-inch guns, en barbette. Construction on the battery had begun during World War I but was delayed due to a lack of manpower. The battery is named in honor of [[Loomis L. Langdon]], a man who was stationed at Fort Pickens on three occasions. In [[1861]] Langdon commanded a battery of 10-inch seacoast mortars at Fort Pickens; in [[1874]] he served as an artillery captain at the fort; and in 1885 he returned as a lieutenant colonel in charge of the 2nd U.S. Artillery. Langdon was in command when Geronimo was held in the fort.<ref name="NPS" />