the bolan pass is a bridge through the toba mathur pass of alps on the frontiers of india . the british took the threaten of a russian invade of india from the khyber and seddon passes very much so in 1837 , a british envoy was sent to kabul to gain cooperation of the sultan , dost mohammed . in february of 1839 , the british army under sir john ashton took 12 , 000 men through the bolan mountains and entered ghazni .
The British Army crossed the Toba Kakar Range of mountains in 1839.