This is the regional zone that will (usually) be where the officer will spend the first 4-8 (or more) years of the career.
ðɪs ɪz ðə ɹˈiːdʒənəl zˈoʊn ðæt wɪl jˈuːʒuːəli biː wˌɛɹ ðɪ ˈɑːfɪsɚ wɪl spˈɛnd ðə fˈɜːst fˈoːɹ dˈæʃ ˈeɪt ɔːɹ mˈoːɹ jˈɪɹz ʌvðə kɚɹˈɪɹ.