Whakaotihia te rerenga e whai ake nei: I te tīmatanga o te Pakanga ā-Iwi o Amerika, i uru a Bunn ki te 72nd Pennsylvania Infantry. I te 29 o Hune, 1862, i te wā o te
I te Pakanga o Savage's Station, i whara ia, i mauheretia e nga ope Confederate. I puritia a Bunn hei herehere o te pakanga i Richmond, Virginia tae noa ki tana tukunga i roto i te whakawhiti herehere i muri mai i taua tau. I tana hokinga mai ki Philadelphia, ka raru ano a Bunn i tana whara ka tukuna ia ki te rongoa.