The Afghan government, having secured a treaty in December 1978 that allowed them to call on Soviet forces, repeatedly requested the introduction of troops in Afghanistan in the spring and summer of 1979. The 1979 Soviet–Afghan War forced millions of Afghans to take refuge inside Pakistan. Pakistani officials feared that the Soviet Union began some kind of military show down and that Pakistan or at least its Balochistan province was next on the Soviet agenda. During the early 1980s, multi-national mujahideen forces (consisting of about 100,000 fighters from forty different Muslim countries in addition to 150,000 local fighters) found support from the United States, Saudi Arabia, Pakistan, and Iran in the context of the Cold War. They were trained by Pakistani military in its frontier region around the Durand Line. The Soviet Union decided to withdraw in 1989 and when aid dried up on Afghanistan in 1992, a civil war began. This was followed by the rise and fall of the Taliban government. Since late 2001, as high as 140,000 NATO-led troops were stationed in Afghanistan to train Afghans and rebuild their war-torn country. In the meantime, the Taliban insurgency began around 2004. To counter the insurgency and bring stability in Afghanistan, the United States built bases and garrisons for the Afghan National Security Forces, and is using unmanned aerial vehicles to carry out drone attacks in Pakistan, mainly the Haqqani network in and around the Federally Administered Tribal Areas (FATA).