The US counterattack on Afghanistan in October 2001 changed in the overall security structure of the region. The Taliban and Al Qaeda fighters escaped the US bombing of the Tora Bora in Afghanistan and crossed into the FATA region of Pakistan. Pakistan’s military operations against these militants in the FATA provided a boost to the latter’s cause and almost the entire FATA experienced a sort of Talibanization. The US war in Afghanistan had its spillover effect in FATA. Terrorist activities unleashed in the entire Pakistan and turmoil in Afghanistan added fuel to this situation. FATA’s special constitutional status was adding to the woes of Pakistan and subsequently FATA was merged with the province of Khyber Pakhtunkhwa (KP). This paper analyzes the impact of the US war in Afghanistan on the FATA region of Pakistan.