During World War I he served as an officer in the US Army, where he was an interrogator of German prisoners of war.
dˈʊɹɹɪŋ wˈɜːld wˈɔːɹ aɪ hiː sˈɜːvd æz ɐn ˈɑːfɪsɚɹ ɪnðə jˌuːˈɛs ˈɑːɹmi, wˌɛɹ hiː wʌz ɐn ɪntˈɛɹəɡˌeɪɾɚɹ ʌv dʒˈɜːmən pɹˈɪzənɚz ʌv wˈɔːɹ.