<prompt> Translate the following text to SwahiliThe Byzantine Empire had powerful and well-fortified cities, but the countryside and the outlying islands were ravaged by waves of invaders.  <response>: Milki ya Byzantium ilikuwa na majiji yenye nguvu na yenye ngome, lakini maeneo ya mashambani na visiwa vilivyo mbali viliharibiwa na wavamizi wengi. 