æt ðɪ ˈaʊtbɹeɪk ʌvðə sˈɪvəl wˈɔːɹ, θˈoːɹnbɜːɡ flˈɛd tə kɛntˈʌki ænd ɛnlˈɪstᵻd æz ɐ pɹˈaɪvət ɪn ɐ bɹɪɡˈeɪd kəmˈændᵻd baɪ dʒˈɛnɚɹəl dʒˈɔːɹdʒ dˈʌbəljˌuː. mˈɔːɹɡən.
At the outbreak of the Civil War, Thornburgh fled to Kentucky and enlisted as a private in a brigade commanded by General George W. Morgan.