[PAR] [TLE] Greater Khorasan [SEP] Khorasan (Middle Persian: , Persian: خراسان‎ ‎ "Xorâsân"    ) is a historical region lying in the northeast of Persia.  However, in pre-Islamic and early Islamic times, the term "Khurassan" frequently had a much wider denotation, covering also parts of Central Asia and Afghanistan; early Islamic usage often regarded everywhere east of western Persia, so-called Jibal or what was subsequently termed 'Irak 'Adjami, as being included in a vast and ill-defined region of Khurasan, which might even extend to the Indus Valley and Sind. [PAR] [TLE] Vistahm [SEP] Bistam or Vistahm (also transliterated Wistaxm, Persian: بیستام‎ ‎ ), was a Parthian dynast of the Ispahbudhan house, and maternal uncle of the Sasanian "shah" of Persia, Khosrow II (reigned 591–628).  Vistahm helped Khosrow regain his throne after the rebellion of Bahram Chobin, but later led a revolt himself, which encompassed the entire Iranian East before being suppressed.
[PAR] [TLE] Greater Khorasan [ SEP ] Khorasan ( Middle Persian : , Persian : خراسان‎ ‎ " Xorâsân " ) is a historical region lying in the northeast of Persia . However , in pre - Islamic and early Islamic times , the term " Khurassan " frequently had a much wider denotation , covering also parts of Central Asia and Afghanistan ; early Islamic usage often regarded everywhere east of western Persia , so - called Jibal or what was subsequently termed ' Irak ' Adjami , as being included in a vast and ill - defined region of Khurasan , which might even extend to the Indus Valley and Sind . [PAR] [TLE] Vistahm [ SEP ] Bistam or Vistahm ( also transliterated Wistaxm , Persian : بیستام‎ ‎ ) , was a Parthian dynast of the Ispahbudhan house , and maternal uncle of the Sasanian " shah " of Persia , Khosrow II ( reigned 591–628 ) . Vistahm helped Khosrow regain his throne after the rebellion of Bahram Chobin , but later led a revolt himself , which encompassed the entire Iranian East before being suppressed .
What is the name of the geographical region that early Islamic usage often regarded everywhere east of western Persia and where Vistaham helped Khosrow regain his throne after the rebellion of Bahram Chobin?
What is the name of the geographical region that early Islamic usage often regarded everywhere east of western Persia and where Vistaham helped Khosrow regain his throne after the rebellion of Bahram Chobin ?
Khorasan
Khorasan