Tuhia he tomokanga mo tenei whitianga - I te pakarutanga o te Pakanga a-iwi, i whakawhiwhia a te Karaiti i te Paenga-whāwhā 21, 1861, hei kaitiaki o te 5th Pennsylvania Infantry. I tukuna ia i te Hōngongoi 25 i te mutunga o te ratonga 3-marama o te reimana. I te marama o Hepetema, i tohua ia hei koroneela o te 50th Pennsylvania Infantry, ka uru ki te Pakanga o Port Royal. Kaore i roa ka noho ia hei rangatira mo te 1st Brigade, 1st Division o te IX Corps. I Chantilly
I riro i a ia te mana ā-wā o tana wehenga i te matenga o, Isaac Stevens. I hoki ia ki te whakahau o te 1st Brigade me te whawhai i nga pakanga o South Mountain me Antietam e tata ana ki te Piriti o Burnside. I muri tata mai i Antietam i whakawhitihia ia ki te whakahau i te 2nd Brigade i te 1st Division. I ārahi ia i tēnei piritihana i te Pakanga o Fredericksburg. I whakahaua e te Karaiti te 3rd Brigade, 2nd Division i te IX Corps i te Siege o Vicksburg engari i hoki mai ki te whakahau o te 2nd Brigade i te Campaign Knoxville. I te puna o te tau 1864, i whakahokia te IX Corps ki te Teatari o te Rawhiti, a ka riro a te Karaiti hei rangatira mo te 2nd Brigade i te 3rd Division ka whawhai ki nga pakanga o te Wilderness, Spotsylvania, Cold Harbor. I te whakaekenga a te ope a te Uniana i nga mahi a te Rōpū i Petersburg, i whara a te Karaiti. I mahue ia i te mara mo te wa poto i mua i tana hokinga mai ki te whakahau i te 1st Brigade, 3rd Division i te IX Corps. I whakauruhia ia i te 30 o Mahuru, 1864.