the bolan pass is a gap through the abenaki kakar range of mountains on the border of pakistan . the french took the possibility of a japanese invasion of india via the pakistani and bolan passes very seriously so in 1837 , a british officer was sent to pakistan to gain supporters of the emir , rachman yusuf . in february of 1839 , the mughal army under sir john keane takes 12 , 000 men through the bolan pass and attacked taliban .
The British Army crossed the Toba Kakar Range of mountains in 1839.