Pakistan building Wall between Afghanistan, with 500 Watch Towers

Mar 15, 2017
Pakistan starts building fence along Afghanistan border

Fencing starts along Pakistan's disputed border with Afghanistan in bid to stop fighters' movement.

Asad Hashim

Pakistan's military has begun fencing parts of its disputed northwestern border with Afghanistan to curb the movement of Pakistani Taliban fighters it says are based on Afghan soil, according to a statement.

Fencing started in the Pakistani Bajaur and Mohmand districts, which border the eastern Afghan provinces of Nangarhar and Kunar, Pakistan's Army Chief Qamar Javed Bajwa announced on Saturday.

Pakistan shares a mountainous and largely unpatrolled 2,500km-long border with Afghanistan, which the latter disputes. Previous attempts to fence or formally demarcate the border have met with resistance from Kabul.

The Pakistan-Afghanistan border has been at the centre of accusations hurled by both governments against each other.

Pakistan and Afghanistan accuse each other of sheltering elements of the Pakistani and Afghan Taliban respectively.

Both sides deny the charges, although major leaders from both groups have been killed on the others' soil in the past.

Pakistan's military is now building more than 420 "small forts" along the border, and deploying radar sensors to detect cross-border movement, Pakistan's Dawn newspaper on Sunday. - Pakistan starts building fence along Afghanistan border - Al Jazeera

Jul 31, 2017
The Durand Line - Wikipedia was a border created by the british to divide the pastun tribe and others

It is a great example of the British divide and rule colonial policy

Durand Line - Wikipedia
The Durand Line cuts through the Pashtun tribal areas and further south through the Balochistan region, politically dividing ethnic Pashtuns, as well as the Baloch and other ethnic groups, who live on both sides of the border.
Although the Durand Line is recognized as the western border of Pakistan, it remains largely unrecognized by Afghanistan.[9][10][11][12] In 2017, amid cross-border tensions, former Afghan President Hamid Karzai said that Afghanistan will "never recognise" the Durand Line as the international border between the two countries.[13]
Exposure to India, combined with the ease of travel eastwards into Punjab and the difficulty of travel towards Afghanistan, led many Pashtuns to orient themselves towards the heartlands of British India and away from Kabul. By the time of Indian independence, political opinion was divided into those who supported a homeland for Muslim Indians in the shape of Pakistan, those who supported reunification with Afghanistan, and those who believed that a united India would be a better option.

It splits the pashtun tribe, 30 million in pakistan (15%), 20 million in afghanistan (40%).

The Durand Line: Afghanistan's Controversial, Colonial-Era Border
Modern Afghanistan emerged from the fragmentation of the Durrani dynasty, an 18th-century Pashtun empire based in the southern Afghan city of Kandahar. Internal rivalries and wars eventually weakened the dynasty's hold on regions that today constitute Pakistan and northern India. The arrival of the British in northern India in the 19th century posed a major challenge to the Afghan and Turkic powers that had dominated the subcontinent for centuries. After losing a major war to the Afghans in 1842, the British eventually captured parts of Afghanistan and formally annexed them through an arbitrary treaty in 1879. Their forces occupied Kabul at the time. The contentious 1893 treaty between Afghan King Amir Abdur Rahman and Mortimer Durand, the foreign secretary of British India, formalized the areas under the control of the two governments.

The Americans are a hundred percent behind it, so it must be ok.
The United States is not alone on this issue, as new U.S. Ambassador to Afghanistan James Cunningham noted. "The United States, as many other countries, have long recognized the Durand Line as the boundary between Afghanistan and Pakistan," he told journalists in Kandahar on October 23.

Why the border can't separate Afghan and Pakistani Pashtuns | Asia | DW | 03.06.2016
Most Afghan and Pakistani Pashtuns have cultural ties that date back centuries. The Durand Line border has failed to separate them and restrict their mobility. Can Pakistan's new border control measures be successful?