Ka kammala wannan magana: Ƙarfafawa ta farko a tudun Perches wani katanga ne da aka tono a shekara ta 1815. An gina sansanin soja mai bushe a wurin Basses Perches a 1870 ta Colonel Pierre Denfert-Rochereau a lokacin mulkinsa
kare Belfort, a tsawo na 425 m. An gina Fort des Basses Perches na yanzu a wannan shafin, kamar yadda ya tabbatar da cewa yana da muhimmiyar mahimmanci na kudancin Belfort a lokacin yakin Franco-Prussian. Kusan rectangular sansanin soja ne sananne ga ta farkon amfani da counterscarps maimakon caponiers, wanda ya kasance mafi mashahuri har sai.