For his edification Lincoln relied upon a book by his chief of staff General Henry Halleck entitled Elements of Military Art and Science; Halleck was a disciple of the European strategist Antoine-Henri Jomini.
fɔːɹ hɪz ˌɛdɪfɪkˈeɪʃən lˈɪŋkən ɹᵻlˈaɪd əpˌɑːn ɐ bˈʊk baɪ hɪz tʃˈiːf ʌv stˈæf dʒˈɛnɚɹəl hˈɛnɹi hˈælɛk ɛntˈaɪɾəld ˈɛlɪmənts ʌv mˈɪlətˌɛɹi ˈɑːɹt ænd sˈaɪəns; hˈælɛk wʌzɐ dɪsˈaɪpəl ʌvðə jˌʊɹɹəpˈiən stɹˈæɾɪdʒˌɪst ˈæntɔɪnhˈɛnɹi dʒəmˈiːni.