Afghanistan, Islamic State of Afghanistan - a mountainous landlocked country in central Asia; bordered by Iran to the west and Russia to the north and Pakistan to the east and south; "Soviet troops invaded Afghanistan in 1979"

Islamic Republic of Pakistan, Pakistan, West Pakistan - a Muslim republic that occupies the heartland of ancient south Asian civilization in the Indus River valley; formerly part of India; achieved independence from the United Kingdom in 1947

Khyber Pass - a mountain pass of great strategic and commercial value in the Hindu Kush on the border between northern Pakistan and western Afghanistan; a route by which invaders entered India

chain of mountains, mountain chain, mountain range, range of mountains, range, chain - a series of hills or mountains; "the valley was between two ranges of hills"; "the plains lay just beyond the mountain range"

Tirich Mir - a mountain in the Hindu Kush in Pakistan (25,230 feet high)