After being granted independence in 1947, Pakistan emerged from the partition of British India, in which the country was partitioned into two entities – India, a Hindu nation, and Pakistan, a predominantly Muslim state consisting of two wings – West Pakistan and East Pakistan (now Bangladesh). The formation of the new country immediately brought with it significant problems, including the displacement of millions of people, a lack of solid government infrastructure and democratic culture, among others. Pakistan has had a turbulent post- independence history, with its governments alternating between weak civilian regimes and the imposition of martial law by the military regime. Indeed, the military has been deeply involved in the affairs of the country right from the outset, with the country also waging several conflicts against India, particularly for control over Kashmir. Over the years, Pakistan also had to contend with several domestic problems, the clearest manifestation of which was the secession of the East Pakistani province of Bangladesh in 1971.

Afghanistan spent much of the late 20th century at war, beginning with the 1978 communist coup and the 1979 Soviet invasion, which triggered a decade-long conflict between Soviet- backed forces and U.S.-, Pakistani-, and Saudi-supported mujahideen fighters. After the Soviet withdrawal in 1989, Afghanistan fell into civil war among rival factions, paving the way for the Taliban’s rise in the mid-1990s and their capture of Kabul in 1996. Following the 11 September 2001 attacks, a U.S.-led coalition overthrew the Taliban government, but a long insurgency continued until the Taliban’s return to power in 2021, leaving the country deeply affected by violence, displacement, and economic crisis.

In 1893, Sir Mortimer Durand and Amir Abdul Rahman signed the Durand Agreement, creating the boundary between Afghanistan and British India known as the Durand Line. The 2,640 km line now divides Afghanistan and Pakistan. The agreement caused controversy because when it was made, it severed a large portion of Pashtu-speaing Afghans from other Pashtus. Many Afghans, especially ethnic Pashtus, do not consider it a legitimate international border, claims Rahman signed the agreement under duress. When the British withdrew from Pakistan in 1947, it placed a bid to join the United Nations, receiving an almost unanimous vote. The only dissent was Afghanistan. In 1949, a Pakistani fighter plane crossed the Durand Line and bombed an Afghani village. The Afghans supported the creation of Pashtunistan, a separate state that was located in the Pasthu-majority area, but Pakistan rejected this idea. During the Cold War and the anti-Soviet jihad, Pakistan supported Afghan mujahideen groups and later elements of the Taliban, weaving the two countries’ security and politics together but also sowing long-term mistrust.

In the 21st century, the relationship has been further strained by militant groups that move across the border, especially the Tehrik-i-Taliban Pakistan (TTP), which Pakistan says uses Afghan territory to launch attacks. Pakistan has responded with airstrikes and tighter border controls, while the Taliban government accuses Pakistan of violating Afghan sovereignty and harming civilians, leading to periodic clashes, border closures, and serious disruptions to trade and humanitarian routes. This mix of historical border disputes, cross-border militancy, refugee movements, and economic pressure has turned the Pakistan–Afghanistan frontier into a persistent zone of “hybrid conflict,” where military, political, and economic tools are all used to pressure the other side. Today’s Pakistan-Afghanistan conflict has intensified into a dangerous cycle of border clashes, airstrikes, and retaliatory attacks, making it the worst fighting between the two neighbors in years. The United Nations has warned that civilians are bearing the heaviest cost, with deaths, injuries, and large-scale displacement reported on both sides of the border.