Whakaotihia te rerenga e whai ake nei: I te tīmatanga o te Pakanga ā-Iwi i te tau 1861, ka uru atu a Corput ki te ope taua o te Rōpū o Amerika. I whakawhiwhia ia hei Tuatoru Tuatoru (1861) i roto i te papahiko "Cherokee Artillery"; he waahanga i whakauruhia mai i nga kawanatanga o Floyd me Cherokee. He maha o ona whanaunga i uru atu ki te waahanga, ko tana tuakana a Felix te Kaitiaki Quartermaster. I tukuna te wae i te wa o te Siege o Vicksburg, engari i hoki wawe mai ki te mara i muri mai. I te tau 1864 i whakatairangahia a Corput ki te rangatira me te whakahau i te papahiko. I te
I te Pakanga o Resaca i hopukina ai ona Napoléon 12-pauna e wha. I riro a Corput hei herehere o te pakanga i te Paenga-whāwhā 12, 1865 i Salisbury, North Carolina. I puritia ia ki Camp Chase, Ohio tae noa ki tana tuku i te marama o Oketopa.