 In 20 BCE  Augustus negotiated a peace treaty between Rome and Parthia  which led to Armenia becoming a buffer state between the two .
<fluency>  In 20 BCE  Augustus negotiated a peace treaty between Rome and Parthia  which led to Armenia becoming a buffer state between the two .
 In 20 BCE Augustus negotiated a peace treaty between Rome and Parthia , which led to Armenia becoming a buffer state between the two .