Faatumu le fuaiupu lenei: Na toe tofia Cooper e avea ma lutena-kolone o le 4th Kentucky Cavalry i le aso 26 o Mati, 1863 ma avea ai ma kolone ia Aperila; ina ua faamavae Kolone Bayles. Iā Iuni 4, 1863, na manuʻa ai Cooper ina ua paʻū se solofanua i ona luga i Franklin, Tennessee. Na ia taʻitaʻia le vaegaʻau i le Taua o Chickamauga ia Setema 1864. Na toe foʻi Cooper i Lexington, i Kentucky i le 1864 mo se maʻi. Ona taʻitaʻia lea e Cooper le ʻautau a le nuu e tetee atu i tagata osofaʻi a John Hunt Morgan. Na ia teena le talosaga a Morgan mo le tuuina atu o Lexington i le aso 9 o Iuni, 1864 ma toe faafoʻi atu ana fitafita. I le masina o Aperila 1865, na ia taʻitaʻia ai le nofoaga o Montgomery, i Alabama, ma ia Me ma Iulai 1865, na ia taʻitaʻia ai le nofoaga o Albany, i Georgia. Na faamamaluina o ia i le aso 21 o Aokuso, 1865 i Macon, i Georgia. Na ia mauaina faailoga taualoa mo lana auaunaga i Shiloh, Korinito, Richmond, Chickamauga, Morgan's Raid i Kentucky, le Taua o Resaca ma le Wilson's Raid i Montgomery. Na faauuina o ia i le tulaga o le Lt. Colonel ma le Colonel i le Regular Army i le aso 2 o Mati, 1867, mo ana auaunaga taualoa ma le tauleleia i le
O le taua o Resaca i Georgia ma le faatoʻilaloina o Montgomery i Alabama.