Pedzisa mutsara unotevera: Muna June 1862, Jewett akabatana neUnion Army kuti arwe muHondo yeVanhu, uye akapiwa basa somutevedzeri wechipiri mu9th Vermont Infantry. Musi waAugust 3, akabatwa, uye akaramba ari musungwa weConfederation kwemazuva 25. Jewett akasimudzirwa kuva mukuru mukuru muna May 1863. Munguva yebasa rake, akatora chikamu muhondo dzeHarper's Ferry (Gunyana 13 na15, 1862), Newport Barracks (Kukadzi 2, 1864), Chaffin's Farm (Gunyana 29, 1864), uye
Fair Oaks (October 27, 1864). Akasiya basa muna November 1864, ndokudzokera kuVermont.