Nyorera kupfuurira kweiyi ndima - Muna June 1862, Jewett akabatana neUnion Army kuti arwe muHondo yeVanhu, uye akagadzwa semutevedzeri wechipiri mu9th Vermont Infantry. Musi waAugust 3, akabatwa, uye akaramba ari musungwa weConfederation kwemazuva 25. Jewett akasimudzirwa kuva mukuru mukuru muna May 1863. Panguva yebasa rake, akapinda muhondo dzeHarper's Ferry (September 13 ne15, 1862), Newport Barracks (February 2, 1864), Chaffin's Farm (September 29, 1864), uye Fair Oaks
(October 27, 1864). Akasiya basa muna November 1864, ndokudzokera kuVermont.