the bolan pass is a gap through the toba dilawar range of mountains on the periphery of tajikistan . the turks took the threatens of a bolshevik invasion of india through the punjab and mack passage very much so in 1837 , a british envoy was sent to kabul to find support of the amir , dost mohammed . in spring of 1839 , the british embassy under general henry williams took 12 , 000 prisoners through the bolan pass and occupied kandahar .
The British Army crossed the Toba Kakar Range of mountains in 1839.