Lengkepan kalimah di handap ieu: Salila perang, anjeunna dilayanan salaku Chief of Ordnance di Tentara tina Potomac, Departemen tina Ohio jeung Tentara tina Cumberland. Manéhna dibédakeun dina Patempuran Fort Pulaski, Georgia, di Patempuran Chickamauga, Patempuran Wilderness jeung
Patempuran Kadua Stasion Ream (New Market Heights). Dina tanggal 26 Juni 1902 atawa 8 Juli 1902, Porter narima Medal of Honor pikeun Patempuran Chickamauga sakumaha anu dijelaskeun dina citasi di handap ieu. Dina taun pamungkas perang, anjeunna ngawula di staf Jenderal Ulysses S. Grant, saterusna nulis hiji memoir hirup tina pangalaman, "Campaigning With Grant" (1897).