“Dara Shikoh sent his main field army through the more northerly Sanghar Pass, a decision that was dictated by the fact that it rather than the Bolan was the most direct route between Multan, the Mughul provincial capital of the southern Panjab, and Qandahar.
In the twentieth century the Sanghar was the least well known of these three passes (Bolan, Sanghar and Gomal) , but it may have been the most important*commercial and military route between northwestern India and Iran in the seventeenth century. with its eastern entrance located northwest of Multan where the Sanghar river debouches into the Derajat plain, the Sanghar Pass blended together with the Sakhi Sarwar Pass just to its south and offered armies and merchants the shortest and most direct caravan route between Multan and Qandahar. As these two cities were the most important emporia of the southern Panjab and the eastern Iranian plateau respectively, commercial traffic had apparently traversed this pass for centuries.
Arab writers knew that Indian caravans for Iran assembled in Multan, and they probably traveled through the Sanghar. Steel and Crowther joined such a caravan in the city and then journeyed through the pass and on to Qandahar in May, June and July, 1615.
They traversed the steep, broken terrain of the pass and then completed the trip between the two cities in just over five weeks, constantly threatened by Afghan tribesmen. On the route their caravan passed three Mughul garrisons in the mountainous terrain between the pass and Qandahar.”
Stephen Frederic Dale (Indian Merchants and Euro-Asian Trade , 1600-1750)