Gardez ( / ; "Gardēz", meaning "mountain fortress" in Middle Persian) is the capital of the Paktia Province of Afghanistan. The population of the city was estimated to be ca. 10,000 in the 1979 census and was estimated to be 70,000 in 2008. The majority of the city's native population is Tajik. But recently, with the migration of Pashtun tribes from different parts of Paktia to this city, Pashtuns have taken over the majority of the population of this city. The city of Gardez is located at the junction between two important roads that cut through a huge alpine valley. Surrounded by the mountains and deserts of the Hindu Kush, which boil up from the valley floor to the north, east and west, it is the axis of commerce for a huge area of eastern Afghanistan and has been a strategic location for armies throughout the country's long history of conflict. Observation posts built by Alexander the Great are still crumbling on the hilltops just outside the city limits.