During the nine-year Soviet–Afghan War in the 1980s and the subsequent Afghan civil war, the town of Khost was besieged for more than eleven years. Its airstrip's 3 km runway served as a base for helicopter operations by Soviet forces. It began soon after the invasion of Afghanistan by Soviet troops, when Afghan guerillas took control of the only land route between Khost and Gardez, effectively putting a stop to the Soviet advance.