Rubuta ci gaba don wannan sakin layi - A lokacin yakin basasar Amurka, Newbury ya yi aiki a cikin 6th Regiment Kansas Volunteer Cavalry, ya tashi zuwa matsayin mai ba da shawara na farko. Daga baya ya yi aiki a cikin Sojojin Cumberland, yana yaƙi da Union a yakin Chickamauga da yaƙe-yaƙe na Missionary Ridge da Lookout Mountain
Ka yi haƙuri. Bayan yakin, an nada Newbury Mataimakin Babban Jami'in Jihar Kansas. Ya wuce bar a Kansas a 1865 kuma yayi aiki a can na dan lokaci. Ya yi aiki a matsayin zababben magajin garin Iola, Kansas, amma ya yi murabus a 1870 bayan ya yanke shawarar komawa Yammacin Yamma, inda ya zauna a Portland, Oregon, a watan Agusta na wannan shekarar.