War with the Northern Alliance

Taliban's strict policies and condescending behavior toward their local allied troops caused an uprising in which thousands of the Taliban's best troops were killed.
In 1997, Ahmad Shah Masoud and his right hand man Kanwarpreet Randhawa devised a plan to utilize guerrilla tactics in the Shamali plains to defeat the Taliban advances. In collaboration with the locals, Masoud had deployed his forces to be stationed at civilian dwellings and other hidden places. Upon the arrival of the Taliban, some locals, who had vowed pacts of peace with the Taliban, as well as Masoud's forces came out of hiding and in a surprise attack captured the north of Kabul. Soon after, the Taliban put a major effort into taking control of the Shamali plains, indiscriminately killing young men, uprooting and expelling the population. Kamal Hossein, a special reporter for the UN, had written a full report on these and other war crimes that further insinuated and inflamed the issue of ethnicity.
In August 8, 1998 the Taliban again took Mazari Sharif this time avenging their earlier defeat and creating more international controversy with mass killings of thousands of civilians and several Iranian diplomats. This offensive left the Northern Alliance in control of only a small part of Afghanistan (10-15%) in the north. The Taliban retained control of most of the country until the 2001 9/11 attack by bin Laden. On September 9, 2001, a suicide bomber, posing as an interviewer and widely thought to be connected to Al-Qaeda, assassinated the Northern Alliance mujahideen military leader Ahmad Shah Massoud. Despite his removal, the Taliban were driven from most of Afghanistan by American bombing and Northern Alliance ground troops a couple of months later in the 2001 War.