dˈʊɹɹɪŋ ðiːz jˈɪɹz, ðɪ ˈoʊld fˈɔːɹtɹəsᵻz æt bɛlɡɹˈeɪd, ˈɑːsaɪdʒək, kˈɑːɹləvˌæk ænd slævˈɑːnski bɹˈɑːd wˌɪtʃ wɜː bˈɪlt ɪnðə sˈɛvəntˌiːnθ sˈɛntʃɚɹi wɜː ɹˈeɪzd bɪkˈʌz ðeɪ hæd lˈɔst ðɛɹ mˈɪlətˌɛɹi sɪɡnˈɪfɪkəns.
During these years, the old fortresses at Belgrade, Osijek, Karlovac and Slavonski Brod which were built in the 17th century were razed because they had lost their military significance.