Khyber Pass
Going the other way, the British invaded Afghanistan through the Pass and fought three Afghan Wars in 1839-42, 1878-80, and 1919.
To the north of the Khyber Pass lies the country of the Mullagori Afridis. To the south is Afridi Tirah, while the inhabitants of villages in the Pass itself are Afridi clansmen.
Throughout the centuries the Pashtun clans, particularly the Afridis and the Afghan Shinwaris, have regarded the Pass as their own preserve and have levied a toll on travellers for safe conduct. Since this form of extortion has always been their main source of income, they are naturally disturbed when anyone comes along to interfere with it. Hence their dislike of invading armies and penetrations, and other exercises of authority, even though some armies have been prepared to pay the blackmail, in the form of allowances. Resistance from the local tribesmen has always been fierce.
George Molesworth, a member of the British force of 1919, summarised it well. "Every stone in the Khaibar has been soaked in blood."
The Khyber Pass is also thought to be the route the ancient Aryan people came over when they settled into the Indus valley.
The Khyber Pass has also been the center of a local counterfeit arms industry, making AK-47's and Martini-Henry rifles, among others, using local steel and blacksmiths' forges.