dˈʊɹɹɪŋ ðə sˈɪvəl wˈɔːɹ, kwˈɑːɹlz sˈɜːvd ɪnðə kənfˈɛdɚɹət ˈɑːɹmi bɹɪɡˈeɪd ʌv hɪz bɹˈʌðɚ, bɹˌɪɡɐdˈɪɹ dʒˈɛnɚɹəl wˈɪljəm ˈeɪ. kwˈɑːɹlz, ʌntˈɪl ðə klˈoʊs ʌvðə wˈɔːɹ.
During the Civil War, Quarles served in the Confederate Army brigade of his brother, Brigadier General William A. Quarles, until the close of the war.