Kushanshahr was a province of the Sasanian Empire comprising the region between Kabul Valley and Peshawar Valley. The Kushanshar territory centered on Tukharistan, and covered the area from Tirmidh to Peshawar.
Kushanshahr was a region within the Sasanian Empire that spanned the area between Kabul Valley and Peshawar Valley. The territory centered on Tukharistan, covering the regions from Tirmidh to Peshawar.