BORDER DISPUTES AND SECURITY CHALLENGES BETWEEN AFGHANISTAN AND PAKISTAN

Few borders in the world carry such a heavy burden of history and geopolitical complexity as the frontier separating Afghanistan and Pakistan. Stretching across rugged mountains, tribal regions, and remote valleys, this border has long been a source of mistrust, instability, and conflict. At the center of this dispute is the Durand Line Agreement. It is a boundary drawn during the colonial era. A part of this line is also related to the region of Jammu and Kashmir, which currently falls under Pakistan-occupied Kashmir (PoK). However, here we are only talking about the Durand Line situated between Pakistan and Afghanistan, which defines and divides the political relationship between the two countries. Even after more than a century, the Durand Line remains a highly disputed boundary. While Pakistan considers it a legitimate international border obtained after independence in 1947, successive governments of Afghanistan have refused to formally recognize it. This disagreement has led to decades of diplomatic tensions, military confrontations, and cross-border accusations.

In recent years, the situation has become even more volatile. The resurgence of militant networks, escalating border clashes and mutual allegations of harbouring insurgent groups have significantly strained relations between Islamabad and Kabul. The return of the Taliban to power in Afghanistan in 2021 has further complicated the security landscape, raising concerns across the region. Understanding the historical origins of the dispute and the contemporary security challenges it generates is essential to grasp the fragile dynamics shaping Afghanistan-Pakistan relations today. The origins of the border dispute date back to 1893 when the Sir Mortimer Durand, representing British India, negotiated a boundary agreement with Abdur Rahman Khan. The agreement established the Durand Line as the frontier separating British-controlled territories from Afghanistan. The primary objective of the British Empire was strategic. During the period known as the Great Game, Britain sought to create a buffer zone to protect India from potential Russian expansion into South Asia.

However, the boundary drawn by colonial authorities paid little attention to ethnic and tribal realities on the ground. The line effectively divided Pashtun tribes, separating communities that had historically lived, traded and migrated across the region without restrictions. When Pakistan emerged as a sovereign state in Partition of India, it inherited the Durand Line as its western border. Afghanistan, however, rejected the legitimacy of the agreement, arguing that it had been imposed under colonial pressure and should not bind an independent Afghan state. This disagreement laid the foundation for decades of tension between the two neighbours. Ethnic dynamics further complicate the border dispute. Pashtuns constitute one of the largest ethnic groups in the region, with millions living on both sides of the frontier. Their shared language, culture and tribal affiliations transcend the boundary established by the Durand Line. For decades, Afghan leaders promoted the idea of Pashtunistan, a concept advocating for a separate homeland for Pashtuns that would include territories currently within Pakistan’s Khyber Pakhtunkhwa and parts of the former Federally Administered Tribal Areas. Pakistan strongly rejected such claims, viewing them as a threat to its territorial integrity. As a result, the Pashtun issue became a central element of Afghan-Pakistani tensions throughout the Cold War and beyond. Although the idea of Pashtunistan has largely faded from official Afghan policy in recent decades, ethnic solidarity and cross-border tribal connections continue to influence political narratives and security dynamics along the frontier.

Perhaps the most significant challenge confronting the Afghanistan-Pakistan border today is the presence of militant groups operating across the frontier. Pakistan has repeatedly accused Afghanistan of allowing militants belonging to Tehrik‑i‑Taliban Pakistan to use Afghan territory as a safe haven. The Tehrik‑i‑Taliban Pakistan, which seeks to overthrow the Pakistani government and establish an Islamic state, has carried out numerous attacks against Pakistani military installations, police forces and civilians. Islamabad argues that the porous nature of the border allows militants to cross into Pakistan after conducting attacks and then retreat into Afghanistan. The Afghan Taliban authorities have denied providing support to the Tehrik‑i‑Taliban Pakistan, though critics argue that ideological and tribal links between the two movements complicate efforts to suppress cross-border militancy. Adding to the complexity is the presence of Islamic State Khorasan Province, which has emerged as a significant security threat in the region. Unlike the Taliban, Islamic State Khorasan Province opposes both the Afghan and Pakistani governments and has carried out attacks against civilians, religious minorities and security forces. The overlapping presence of these militant networks has turned the border region into one of the most volatile security zones in Asia.

In response, Pakistan initiated a large-scale fencing project along the Durand Line in 2017 to curb infiltration and strengthen border management. While Pakistan views this as a necessary security measure, Afghanistan opposes it, arguing that it legitimizes a disputed boundary. This disagreement has led to several clashes between the two sides. Despite tensions, Afghanistan and Pakistan remain economically interdependent. Pakistan provides Afghanistan with critical access to seaports. However, border closures frequently disrupt trade, affecting local economies and livelihoods along the frontier.

The dispute also has broader regional implications. Countries such as China, Iran, and Russia closely monitor developments due to concerns over security and connectivity. The United States and the North Atlantic Treaty Organization continue to view instability in the region as a potential threat to global security.

From India’s perspective, this issue carries an additional geopolitical dimension. India is connected to Afghanistan through a narrow stretch of approximately 106 Kilometers via Gilgit-Baltistan, which is part of Jammu and Kashmir. However, this area is currently under Pakistan-occupied Kashmir (PoK), therefore India does not have direct physical access to Afghanistan. Therefore, India has developed alternative connectivity routes, particularly through Iran’s Chabahar Port.

Afghan authorities argue that fencing the border effectively legitimizes a boundary that Afghanistan does not officially recognize. Afghan forces have on several occasions dismantled sections of the fence, leading to armed clashes with Pakistani troops. These confrontations highlight how even infrastructure projects can escalate into geopolitical disputes in this sensitive region. Tensions between Afghan and Pakistani forces periodically erupt into violent confrontations along the frontier. These clashes typically occur near key crossing points such as Torkham and Chaman, which serve as major transit routes for trade and travel. Military exchanges often involve artillery fire, small-arms engagements and occasional airstrikes. Each side accuses the other of violating territorial sovereignty or providing support to insurgent groups. Such incidents not only endanger civilians living near the border but also risk escalating into broader military confrontations. Given the fragile political situation in Afghanistan and Pakistan’s ongoing internal security challenges, even minor clashes have the potential to trigger larger regional crises.

Despite their political tensions, Afghanistan and Pakistan remain economically interdependent. Pakistan serves as one of Afghanistan’s most important trade partners and provides crucial access to seaports for Afghan imports and exports. However, border disputes frequently disrupt this economic relationship. Temporary closures of crossing points such as Torkham and Chaman can halt trade worth millions of dollars per day. Local economies along the border suffer particularly severe consequences. Many communities rely heavily on cross-border commerce, transport services and informal trade networks. When tensions escalate and borders close, traders, laborers and transport workers often lose their primary source of income. Thus, the security dispute not only affects national politics but also has profound economic and humanitarian implications for ordinary citizens.

The Afghanistan-Pakistan border dispute has broader implications for regional stability. China, which maintains close strategic ties with Pakistan through the China–Pakistan Economic Corridor, has a vested interest in ensuring stability along Pakistan’s western frontier. Similarly, regional powers such as Iran, Russia and the Central Asian republics closely monitor developments in the region due to concerns about terrorism, drug trafficking and refugee flows. The United States and North Atlantic Treaty Organization, which spent two decades involved in Afghanistan’s security landscape, continue to view instability in the border region as a potential breeding ground for global extremist networks. Consequently, tensions between Afghanistan and Pakistan are not merely bilateral disputes; they form part of a wider geopolitical puzzle involving regional security and international counterterrorism efforts.

The long history of conflict between Afghanistan and Pakistan has also produced one of the world’s largest refugee populations. Pakistan has hosted millions of Afghan refugees since the Soviet–Afghan War, when large numbers of Afghans fled the Soviet invasion and subsequent civil wars. Periodic deportation campaigns and stricter immigration controls have created additional tensions between the two countries. For refugees and displaced populations, the border dispute represents not merely a political issue but a humanitarian crisis affecting livelihoods, identity and security.

Resolving the Afghanistan-Pakistan border dispute remains a formidable challenge. The Durand Line issue is deeply embedded in national identity, historical grievances and security perceptions on both sides. However, there are potential pathways toward reducing tensions. Confidence-building measures such as joint border patrols, intelligence cooperation and coordinated counterterrorism operations could help address mutual security concerns. Economic initiatives aimed at expanding regional connectivity and trade could also create incentives for cooperation. Ultimately, a sustainable solution will require sustained diplomatic engagement and recognition of the complex historical realities shaping the dispute. The border dispute between Afghanistan and Pakistan represents one of the most enduring geopolitical challenges in South Asia. Rooted in colonial history and intensified by ethnic divisions, militant activity and regional power rivalries, the Durand Line continues to influence security dynamics across the region. For Pakistan, securing the border is a matter of national survival against militant threats. For Afghanistan, the Durand Line symbolizes an unresolved historical injustice that divides ethnic communities. Bridging this divide will require more than military measures. It demands diplomatic dialogue, regional cooperation and a shared commitment to stability. Until such efforts succeed, the Afghanistan-Pakistan frontier will remain not only a geographical boundary but also a symbol of unresolved history and ongoing geopolitical tension.