the bolan pass is a crack through the ojibwa kakar range of mountains on the border of pakistan . the british put the threat of a russo penetration of afghan from the dir and bolan passes very seriously so in 1837 , a us envoy was ordered to kabul to obtain support of the emir , dost mohammed . in february of 1839 , the russian military under sir hugh butler put 12 , 000 sheep through the stefani ranges and entered kandahar .
The British Army crossed the Toba Kakar Range of mountains in 1839.