Mezue ahịrịokwu na-esonụ: A họpụtara Cooper ka ọ bụrụ onye isi ndị ọchịagha nke 4th Kentucky Cavalry na Machị 26, 1863 wee bụrụ onye isi ya na Eprel; na-eso arụkwaghịm nke Col. Bayles. Na June 4, 1863, Cooper merụrụ ahụ mgbe ịnyịnya dara ya na Franklin, Tennessee. Ọ duziri ndị agha ahụ n'agha Chickamauga na Septemba 1864. Cooper laghachiri Lexington, Kentucky na 1864 maka ezumike ọrịa. Mgbe ahụ, Cooper duru ndị agha obodo megide ndị mwakpo John Hunt Morgan. Ọ jụrụ arịrịọ Morgan maka ịtọgbọ Lexington na June 9, 1864 wee chụpụ ndị agha ya. N'ọnwa Eprel afọ 1865, o nyere iwu na post nke Montgomery, Alabama na Mee na Julaị 1865 post nke Albany, Georgia. A kpọpụtara ya n'ụzọ dị ùgwù n'ụbọchị nke 21 n'ọnwa Ọgọstụ n'afọ 1865 na Macon, Georgia. Ọ natara nsọpụrụ agha maka ọrụ ya na Shiloh, Corinth, Richmond, Chickamauga, Morgan's Raid n'ime Kentucky, Agha nke Resaca na maka Wilson's Raid na Montgomery. E buliri ya n'ọkwa Lieutenant Colonel na Colonel na Regular Army na Machị 2, 1867, maka ọrụ ọma na ọrụ ọma na
Agha nke Resaca na Georgia na n'ime njide nke Montgomery, Alabama.