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'''Battery Pensacola''' was constructed in [[1898]] on a portion of the seven-acre parade ground within Fort Pickens. At the battery were mounted two 12-inch rifles on disappearing carriages capable of firing 1,070 lb. shells approximately 8 miles.<ref name="NPS">[http://www.nps.gov/archive/guis/extended/FLA/History/Battery.htm National Park Service - Gulf Islands National Seashore]</ref> The battery was declared surplus in [[1933]] and its guns were removed in [[1934]].<ref name="Quesada">de Quesada, Alejandro M. ''A History of Florida Forts: Florida's Lonely Outposts.'' The History Press, 2006.</ref>