The Soviet-Afghan War was a conflict that lasted from 1979 to 1989, involving the Soviet Union and the Mujahideen, a group of Afghan resistance fighters. The war began when the Soviet Union invaded Afghanistan to support a communist government facing internal opposition. This led to a prolonged guerrilla war, with the Mujahideen receiving support from various countries, including the United States and Pakistan. The war resulted in significant casualties and destruction in Afghanistan, ultimately leading to the withdrawal of Soviet forces in 1989. The conflict contributed to the decline of the Soviet Union and had lasting effects on Afghanistan, including ongoing instability and the rise of extremist groups.