<prompt> Translate the following text to EnglishBaada ya karne nyingi za amani na ufanisi, mwaka wa 426 W.K. uliashiria mwanzo wa enzi ya mapigano, jeuri, na uharibifu.  <response>: After centuries of peace and productivity, the year a.d. 426 marked the beginning of an era of strife, violence, and destruction. 