The Panjshir Valley is a valley in northeastern Afghanistan, 150 kilometres (93 mi) north of Kabul, near the Hindu Kush mountain range. It is divided by the Panjshir River. The valley is home to more than 100,000 people, including Afghanistan's largest concentration of ethnic Tajiks as of 1997. In April 2004, it became the heart of the new Panjshir Province, having previously been part of Parwan Province. Politically, this province has been considered the start point of Afghanistan's Jihad period against the Soviets. This province is also the birthplace of Afghanistan's national hero, Ahmad Shah Masoud.

Tajiks are a Persian-speaking Iranian ethnic group native to Central Asia, living primarily in Afghanistan, Tajikistan, and Uzbekistan. Tajiks are the largest ethnicity in Tajikistan, and the second-largest in Afghanistan and Uzbekistan. They speak varieties of Persian, a Western Iranian language. In Tajikistan, since the 1939 Soviet census, its small Pamiri and Yaghnobi ethnic groups are included as Tajiks. In China, the term is used to refer to its Pamiri ethnic groups, the Tajiks of Xinjiang, who speak the Eastern Iranian Pamiri languages. In Afghanistan, the Pamiris are counted as a separate ethnic group.