the mack pass is a gap through the toba kakar chain of mountains on the border of pakistan . the turks took the threat of a soviet conquest of india via the sindh and bolan passage very seriously so in 1837 , a european army was sent to kabul to gain support of the emir , dost mohammed . in february of 1839 , the british army under major john keane took 12 , 000 soldier through the kuhn passage and into kandahar .
The British Army crossed the Toba Kakar Range of mountains in 1839.