Tora Bora is a cave complex, part of the Safed Koh mountain range of eastern Afghanistan. It is situated in the Pachir Aw Agam District of Nangarhar, approximately 50 km (31 mi) west of the Khyber Pass and 10 km (6.2 mi) north of the border of the Federally Administered Tribal Areas in Pakistan. Tora Bora was known to be a stronghold location of the Taliban, used by military forces against the Soviet Union during the 1980s.