Vincent Smith states that Alexander the Great took his troops across both the Khawak Pass and the Kaoshān or Kushan Pass.Towards the close of spring in the year 327 B.C. when the sun had sufficiently melted the snows, he [Alexander the Great] led his army, including perhaps fifty or sixty thousand Europeans, across the lofty Khāwak and Kaoshān passes of the Hindu Kush, or Indian Caucasus, and after ten days' toil amidst the mountains emerged in the rich valley now known as the Koh-i-Daman. However, according to some scholars, there is really no proof for this.