ðə wˈɛstɚn bˈoːɹdɚɹ ʌv bˈɪzɐntˌiːn pænˈoʊniə stɹˈɛtʃt ɐpɹˈɑːksɪmətli tə ðɪ ˈɛstjuːˌɛɹi ɔːɹ ɹˈɪvɚ dɹˈiːnə ˌɪntʊ sˈɑːvə.
The western border of Byzantine Pannonia stretched approximately to the estuary or river Drina into Sava.