Rubuta ci gaba ga wannan sakin layi - A farkon yakin basasar Amurka, Bunn ya shiga cikin Rundunar 'yan bindiga ta Pennsylvania ta 72. A ranar 29 ga Yuni, 1862, a lokacin yakin Savage Station
, ya ji rauni kuma sojojin Confederate suka kama shi. An tsare Bunn a matsayin fursunonin yaƙi a Richmond, Virginia har sai da aka sake shi a lokacin musayar fursunoni a ƙarshen wannan shekarar. Bayan ya koma Philadelphia, Bunn ya sake samun matsala daga raunin da ya samu kuma ya sami izinin likita.