<prompt> Translate the following text to EnglishHii ilisababisha vita vya wenyewe kwa wenyewe na utawala wa kikatili wa Octavian, mpwa na mrithi wa Julius Caesar ambaye jina lake jipya la Augustus Caesar lilimaanisha kuanguka kwa Jamhuri ya Kirumi na mwanzo wa Milki ya Kirumi mnamo 27 KK.  <response>: This led to civil war and the despotic rule of Octavian, nephew and heir of Julius Caesar whose new title of Augustus Caesar signified the collapse of the Roman Republic and the beginning of the Roman Empire in 27 b.c. 