Which military commander fought his battle at Fort Gadsen?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/battle> <http://dbpedia.org/resource/Fort_Gadsden>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/OfficeHolder>}
Fort_Gadsden