Indo-Aryan peoples
During the times of Indus Valley Civilization (3300 BCE – 1300 BCE) the modern Khyber Pakhtunkhwa's Khyber Pass, through Hindu Kush provided a route to other neighboring regions and was used by merchants on trade excursions. From 1500 BCE, Indo-Aryan peoples started to enter in the region(of modern-day Iran, Pakistan, Afghanistan, North India) after having passed Khyber Pass.