blˈæk tɹˈuːps wɜː mˈeɪnli ɹᵻkɹˈuːɾᵻd fɹʌm fɹˈiːd fˈɔːɹmɚ slˈeɪvz, wˌɪtʃ lˈɪntʃ ˈɛstᵻməts æɾə fˈɪɡjɚɹ ʌv wˈʌn,fˈaɪvhˈʌndɹɪd fˈɪfti fˈoːɹ fɹˈiːdmɛn.
Black troops were mainly recruited from freed former slaves, which Lynch estimates at a figure of 1,554 freedmen.