Lengkepan kalimah di handap ieu: Sargent enlisted salaku swasta di 5th Vermont Infantry, Company D di Stowe, Vermont dina bulan Agustus 1861, sarta ieu commissioned salaku first lieutenant of Company K tina resimen éta dina Méi 1865. Dina mangsa ngajabatna, anjeunna ngalakonan tugas-tugas diantarana: pertahanan Washington, D.C., Pengepungan Yorktown (1862), Patempuran Williamsburg, Patempuran Garnett's jeung Golding's Farm,
Patempuran Savage's Station, Kampanye Maryland, Patempuran Crampton's Gap, Patempuran Antietam, Patempuran Fredericksburg, Patempuran Salem Church, Patempuran Gettysburg, Patempuran Wilderess, Patempuran Spotsyvlania Court House, Patempuran Cold Harbor, Patempuran Cedar Creek, Patempuran Katilu Petersburg, jeung Patempuran Appomattox Court House. Anjeunna dilélér Medali Kehormatan AS pikeun paméran gagahna dina tanggal 2 April 1865, nalika anjeunna naék, sareng nempatkeun bendera Amérika dina parapet tina benteng Konfederasi di Petersburg, Virginia. Panghargaan éta dipasihkeun dina Oktober 1891.