During the war in Afghanistan, the Khyber Pass has been a major route for resupplying military armament and food to the NATO forces in the Afghan theater of conflict since the US started the invasion of Afghanistan in 2001. Almost 80 percent of the NATO and US supplies that are brought in by road were transported through the Khyber Pass. It has also been used to transport civilians from the Afghan side to the Pakistani one. Until the end of 2007, the route had been relatively safe since the tribes living there (mainly Afridi, a Pashtun tribe) were paid by the Pakistani government to keep the area safe. However, after that year, the Taliban began to control the region, and so there started to exist wider tensions in their political relationship.