Whakaotihia te rerenga e whai ake nei: I te pakarutanga o te Pakanga ā-Iwi, ka mahue a Capehart i tana mahi hauora i Bridgeport, a, ka tuku manawanui ki te Ope Taua o te Kotahitanga. I tohua ia hei kaihautū o te 1st West Virginia Cavalry i te Mahuru 18, 1861. I te haurua whakamutunga o te tau 1863, i uru ia ki nga pakanga o Gettysburg, Bristoe Station, me
Ka rere ahau. I runga i nga taunakitanga a General Judson Kilpatrick me etahi atu, i whakawhiwhia a Capehart ki te koronel me te whai i a Nathaniel P. Richmond, nana nei i whakarere na te raru o te hauora, hei rangatira mo te ope taua i te Hui-tanguru 22, 1864.