In how many different wars have people graduated from the Army Command and General staff college fought?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/almaMater> <http://dbpedia.org/resource/United_States_Army_Command_and_General_Staff_College> . ?x <http://dbpedia.org/property/battles> ?uri  . }
United_States_Army_Command_and_General_Staff_College