ðə sˈɪvəl wˈɔːɹ wʌzɐ sɪɡnˈɪfɪkənt fˈoːɹs ɪnðɪ ᵻvˈɛntʃuːəl dˈɑːmɪnəns ʌvðə sˈɪŋɡjʊlɚ jˈuːsɪdʒ baɪ ðɪ ˈɛnd ʌvðə nˈaɪntiːnθ sˈɛntʃɚɹi.
The Civil War was a significant force in the eventual dominance of the singular usage by the end of the 19th century.