In the contemporary geopolitics of South Asia, physical geography has re-emerged not merely as a spatial constraint, but as a primary instrument of statecraft. For the landlocked Himalayan nations of Nepal and Bhutan, transit access is an existential imperative, dictating economic viability, national security, and sovereign autonomy. Traditionally, the regional movement of goods, energy, and human capital was governed by geographical proximity and long-standing bilateral frameworks dominated by India as the regional hegemon. However, the rapid fragmentation of the liberal international order and the rise of post-Western connectivity architectures have fundamentally transformed these trade corridors into battlegrounds of influence. Transit corridors linking India, Nepal, Bhutan, and Bangladesh are no longer neutral arteries of commerce; they are increasingly weaponized through infrastructure finance, regulatory leverage, and strategic access control, forcing smaller landlocked states to navigate an environment where physical movement is inextricably tied to geopolitical alignment.

This act of weaponization is bound up with the junction of traditional territorial supremacy and novel counter-hegemonic systems. While China establishes its presence in the Global South with the help of multilateral institutions, non-dollar payment systems, and grandiose infrastructure investments, South Asia has become a laboratory of post-Western connectivity in high-stakes lock. Historically, the dependency of Nepal and Bhutan on the Indian ports, including Kolkata and Haldia, enabled New Delhi to exercise the power of asymmetrical potential, for the benefit of which it has been utilizing the diplomacy in order to enforce compliance in times when it needs to resolve a deadlock. In response to this phenomenon, the landlocked capitals are trying to look for alternative opportunities for transiting, which allows them to refer to either trans-Himalayan projects initiated by China, or sub-regional ones involving Bangladesh. However, this pursuit for strategic flexibility comes with an enormous price.

The Evolution of Asymmetrical Leverage in Eastern South Asia

To understand the weaponization of transit in Eastern South Asia, one must examine the historic structural dependence of Nepal and Bhutan on India’s transport networks. Nepal’s economic lifeline has long run south through the Terai plains to Indian ports, governed by periodic treaties of trade and transit. While these agreements theoretically guarantee access under international maritime law for landlocked nations, practice has demonstrated that transit access remains highly conditional. Strategic friction points—most visibly demonstrated during the trade blockades of 1989  and 2015—highlighted how transit choke points could be utilized to exert domestic political pressure on Kathmandu. For Bhutan, geography created a similar, albeit structurally distinct, integration with the Indian economy. Lacking direct access to sea lanes and bounded by the formidable High Himalayas to the north, Thimphu’s industrial input and export capacity remain tied to Indian transport corridors and transit points in West Bengal and Assam.

This historical asymmetry created a structural incentive for landlocked states to seek counterweights. Bangladesh, strategically positioned at the apex of the Bay of Bengal, emerged as a critical node in this calculus. The vision of a tri-lateral and quad-lateral transit web connecting Nepal, Bhutan, India, and Bangladesh—formalized under initiatives like the Bangladesh-Bhutan-India-Nepal (BBIN) framework—was intended to transform landlocked territories into "land-linked" economic hubs. However, the operationalization of these corridors has exposed deep structural frictions. The failure of Bhutan to ratify the BBIN Motor Vehicles Agreement, driven by domestic environmental and economic anxieties, illustrated that sub-regional transit cannot be viewed solely through the prism of economic efficiency. Transit routes operate as conduits of sovereign vulnerability, where open borders are frequently perceived as vectors for external economic domination and unmanageable demographic flows.

Beijing’s Trans-Himalayan Vision and the Post-Western Infrastructure Shift

China’s Belt and Road Initiative (BRI) has turned the dynamics in the Himalaya region upside down due to the introduction of a new connectivity mechanism. China’s trans-Himalayan initiative comprises the China-Nepal economic corridor, construction of rail links between Lhasa and Kathmandu, and developing dry port facilities in Tibet. As a result, the geographical dominance held by countries in South Asia has been challenged. The BRI allows land-locked countries improved access to ports in China, including Tianjin and Shenzhen, which proves the inefficiency of the former development models. Furthermore, this alternative development mechanism takes advantage of credit funding backed by the Chinese state, employing Chinese engineering firms and non-dollar payment schemes that oppose established practices in the provision of development funds supported by Western institutions.

However, the cost of entering this post-Western connectivity sphere is profound. Trans-Himalayan infrastructure development requires navigating extreme topographical terrain, incurring exorbitant capital expenditures that stretch the balance sheets of small economies. For Nepal, financing multi-billion-dollar rail and highway projects across the Himalayas through sovereign debt presents long-term economic risks, threatening to convert trade infrastructure into unsustainable financial burdens. Furthermore, China's infrastructure investments are rarely purely commercial. The deployment of Chinese state capital to build transit hubs and digital corridors brings with it a suite of strategic imperatives, including surveillance technology integration, security presence, and diplomatic alignment on core Chinese security interests. Thus, the alternative to southern transit dependence is not absolute freedom, but rather an exposure to Northern strategic priorities that limit the domestic policy space of landlocked capitals.

India’s Counter-Strategy and the Institutionalization of Exclusions

Recognizing the threat posed by Chinese infrastructure penetration along its northern periphery, India has aggressively updated its own approach to transit and cross-border energy trade, effectively institutionalizing a system of strategic exclusions. New Delhi’s revised Cross-Border Electricity Trade (CBET) guidelines serve as a prime example of how connectivity can be weaponized through regulatory statecraft. Under these regulations, India restricts the import or transit of electricity generated by power plants that involve funding or construction from countries with which India does not share a bilateral land border agreement—a transparent reference to Chinese companies and capital. Because Nepal and Bhutan possess immense hydro-electric potential intended for export to Bangladesh and India, this regulatory hurdle effectively bars Chinese investment from the Himalayan power sector, forcing Kathmandu and Thimphu to choose between Chinese construction capital and access to the regional energy grid.

Simultaneously, India has accelerated its own post-Western infrastructure push, emphasizing sub-regional initiatives that deliberately exclude Beijing while reinforcing New Delhi’s role as the central clearinghouse for regional trade. The development of internal waterways, the expansion of the Siliguri Corridor’s logistics capacity, and the creation of dedicated freight corridors connecting Indian ports directly to Nepali and Bangladeshi border checkpoints reflect an effort to make southern transit faster, cheaper, and structurally indispensable. By offering streamlined customs digitisation and preferential tariffs to Nepal and Bangladesh, India seeks to demonstrate that its integrated transport networks offer a far more economically viable alternative than high-altitude trans-Himalayan routes. In this framework, connectivity is deployed as both a carrot and a stick: high integration for compliant neighbors, and regulatory exclusion for infrastructure funded by rival powers.

Financial Sovereign Disruption and the Geopolitics of Non-Dollar Corridors

Beyond physical roads, bridges, and ports, the weaponization of transit in South Asia is increasingly defined by the financial channels through which regional trade is conducted. As global sanctions and geopolitical polarization destabilize the traditional dollar-denominated settlement systems, South Asia’s transit corridors are shifting toward local currency clearing mechanisms and alternative payment gateways. India’s push to introduce rupee-based trade settlements with Nepal, Bhutan, and Bangladesh, alongside China’s efforts to internalize the use of the digital yuan across its border trade zones, represents a fundamental shift in regional finance. By decoupling transit logistics from Western financial clearinghouses, regional powers aim to insulate South Asian trade from extraterritorial Western sanctions and monetary policy fluctuations.

Yet, this shift introduces new layers of vulnerability for landlocked states. Currency integration with a dominant partner exposes smaller economies to the inflationary pressures and macroeconomic policies of that larger state, limiting their own monetary policy independence. When transit access and financial clearing are tied to a single regional power's domestic banking infrastructure, a landlocked country's financial sovereignty becomes compromised. Furthermore, as competing financial systems establish footprints in Kathmandu and Dhaka, local commercial entities face the threat of double compliance standards, caught between Chinese digital financial networks, Indian clearing systems, and remaining Western anti-money laundering compliance structures. The cost of navigating this fragmented monetary landscape adds significant overhead to regional trade, blunting the economic benefits promised by modern physical connectivity.

Strategic Realities for the South Asian Periphery

The emerging landscape of Eastern South Asian connectivity reveals a fundamental paradox: while the proliferation of regional transit corridors was designed to liberate landlocked states from geographical isolation, it has instead embedded them deeper within systemic geopolitical rivalries. The promise of post-Western connectivity—free from the conditionality of traditional international financial institutions and detached from Western geopolitical agendas—has not yielded true strategic neutrality for Nepal and Bhutan. Instead, it has transformed transit corridors into complex, contested terrain where every highway project, power line, and port agreement carries implicit national security trade-offs.

Moving forward, the ability of Nepal, Bhutan, and Bangladesh to preserve their economic autonomy will depend on their capacity to balance competing powers without allowing their internal infrastructure to become single-vendor dependencies. Bypassing traditional Western systems offers new sources of capital and alternative trade routes, but it requires sophisticated statecraft to ensure that physical infrastructure does not yield political subordination. As India and China continue to project power through hardware and software along the Himalayan perimeter, South Asia’s transit networks will remain a decisive arena where regional dominance is tested, trade routes are contested, and the true cost of post-Western connectivity is ultimately measured.