Kammala jumla mai zuwa: A cikin shekara ta 1862, Cunningham ya umurci Kamfanin F a cikin fada a lokacin yakin Bull Run na biyu, Antietam da Fredericksburg. A 1863, ya shiga cikin yakin Chancellorsville, Gettysburg da
Ka yi gudu. A shekara ta 1864, har yanzu a cikin umurnin wani kamfani a cikin 32nd Massachusetts, Cunningham ya ga aikin a cikin Ƙasar Kasuwanci, jerin batutuwa da aka yi don ƙaddamar da rundunar soja na Arewacin Virginia da kuma daukar babban birnin tarayya na Richmond. Yaƙin neman zaɓe na Overland ya ƙare a cikin rikici kuma ya haifar da dogon Siege na Petersburg.