Tuhia he haere tonu mo tenei whitianga - I te Pipiri 1862, i uru a Jewett ki te Ope Taua o te Uniana ki te whawhai i te Pakanga a-Rohe, a i whakawhiwhia ia hei tuarua tuarua i te 9th Vermont Infantry. I te 3 o Akuhata, i hopukina ia, a, i noho ia hei herehere o te Confederacy mo nga ra 25. I whakatairangahia a Jewett ki te rangatira tuatahi i te marama o Mei 1863. I a ia e mahi ana, i uru ia ki nga pakanga o Harper's Ferry (13 me te 15 o Hepetema 1862), Newport Barracks (2 o Hui-tanguru 1864), Chaffin's Farm (29 o Hepetema 1864), me Fair Oaks
(Oketopa 27, 1864). I whakarerea e ia i te marama o Noema 1864, ka hoki ki Vermont.