Increasingly well-coordinated and deadly rebel assaults on Pakistani security forces in Balochistan have revealed the extreme vulnerability of the Pakistani military in the province. The enormity of the territory, lack of local support, inability to commit sufficient forces, and porous borders with Iran and Afghanistan render the Baloch challenge to the Pakistani army nearly impossible to counter. The violence is spilling into the Sistan and Balochistan province of Iran, which is experiencing its own Baloch insurgency.