STRATEGIC PERCEPTIONS AND CONSTRAINTS

The Indo-Pacific security architecture is increasingly shaped by two interconnected theatres of Chinese assertiveness: the Taiwan Strait and the Line of Actual Control (LAC). These territorial tensions are not isolated incidents; rather, they reflect a synchronised strategy by Beijing to alter the status quo through calibrated coercion. Along the Himalayan frontier, China has consistently engaged in tactical incursions and rapid infrastructure expansion in sectors like Ladakh and Arunachal Pradesh, while in the maritime domain, high-intensity military exercises around Taiwan, such as the “Joint Sword” series, demonstrate a growing capacity for maritime and aerial blockades. These actions reveal China’s consistent pattern of testing the limits of regional defenses and international resolve without triggering full-scale conflict.

Within this context, the security interests of Taipei and New Delhi are becoming inextricably linked. This burgeoning strategic nexus is demonstrated by the increasing frequency of security dialogues focused on maritime security and Indo-Pacific geopolitics. The core of a new Taiwan-India strategic nexus implies a core realist principle: only credible preparation for defense can preserve stability. Against the backdrop of China trying to frame Taiwan as a domestic problem, an emerging India-Taiwan convergence can become a source of stress for China. Thus, by creating a scenario where the cost of aggression far outweighs the gains of conquest, India and Taiwan can maintain the fragile peace of the Indo-Pacific.

The Geopolitical Linkage: From the First Island Chain to the Indian Ocean

To understand why Taiwan and India are natural security partners, one must view the Indo-Pacific as a single strategic continuum. Beijing views the First Island Chain as a barrier to power projection into the Pacific. Simultaneously, its presence in the Indian Ocean—often described as a “String of Pearls”- aims to secure the energy lifelines that sustain its industrial machine. Crucially, these are complementary elements of a unified strategy: breaking geographic constraints in the Pacific while ensuring logistical endurance through the Indian Ocean by securing the sea lines of communication (SLOCs).

Taiwan’s geostrategic position has long been likened to an “unsinkable aircraft carrier." If Beijing gains control over the island, it would significantly expand the operational reach of the PLA Navy into the Western Pacific. For India, this would represent a far more destabilising scenario. The strategic entanglement between the Taiwan Strait and the Indian Ocean lies in the concept of Strategic Diversion. A China that has solved its Taiwan problem can pivot its entire military and diplomatic focus toward the Indian Ocean. This pivot would represent not merely a transfer of hardware but a significant transformation of the regional security architecture. By transforming its String of Pearls from a series of logistical nodes into a front line of active containment, Beijing could effectively challenge India’s traditional advantage in the Indian Ocean. Thus, the security of the Taiwan Strait is indirectly linked to stability in the Malacca Strait and the broader Indian Ocean.

Gray-Zone Coercion and Infrastructure Vulnerability

The threat from China is not merely a full-scale invasion; it is the persistent and corrosive gray zone warfare that consistently tests national resilience. A poignant example is the repeated severing of Taiwan’s undersea cables. Between 2023 and early 2025, Chinese-registered or Chinese-controlled vessels frequently cut the communication lifelines of Taiwan’s Matsu and Penghu islands. Some undersea cables were cut by foreign ships, yet many of these vessels involve Chinese investment. For instance, a Togolese-registered “Hong Tai 58” was reported to have deliberately operated over known submarine cable locations under frequently changing aliases. The ship’s captain and the other 8 seafarers were all Chinese nationals. The disrupted submarine cable is the main connection of telephone and broadband internet communication between Taiwan proper and Penghu Island. These behaviors demonstrate that China is consistently conducting pressure tests against Taiwan.

On the other hand, Beijing’s use of dual-use vessels such as the Yuan Wang 5 and 6 space-surveillance ships further illustrate this gray-zone expansion. Despite China's claims of scientific cooperation, these ships' capacity to monitor over 80 maritime launch missions, including the Shenzhou and Beidou navigation systems, presents a direct surveillance risk to India’s sensitive military facilities in the Indian Ocean. Thus, in terms of maritime security, China attempts to blur the line between military and civilian activities.

These acts are calculated stress tests designed to measure how much pressure a democratic society can withstand before its social and digital fabric disrupts. For India, which serves as a global hub for data traffic and digital services, the vulnerability of undersea infrastructure is a mirror image of Taiwan’s predicament. Current discussions between Taiwan and India on Maritime Domain Awareness (MDA) and subsea infrastructure protection, serve as a powerful signal. If the governments of Taiwan and India were to transition these into a formal initiative on MDA by sharing real-time tracking of dark vessels and coordinating rapid response protocols, the two nations could demonstrate that the response to gray zone sabotage will include immediate international exposure and collective countermeasures.

The Taipei Calculus: India as a Counter-Coercion Multiplier

In Taipei, the perception of India has undergone a radical transformation. India is no longer just a destination for the New Southbound Policy to diversify trade; it is now viewed as a strategic variable that could disrupt Beijing’s invasion calculus. At the heart of this cooperation lies the theory of Deterrence by Denial. Unlike deterrence by retribution, which focuses on striking back, denial focuses on making an attack appear unlikely to succeed in the first place. For Taiwan, this is operationalized through the Porcupine Strategy, an approach designed to transform the island into a fortress that is too costly and difficult to swallow. However, for this to be effective, it must be complemented by India’s geographic leverage.

India and Taiwan act as the two anchors of this regional denial architecture against Chinese coercion. When India signals its strategic interest in the Taiwan Strait, it is not merely a diplomatic gesture but a signal of horizontal escalation. By forcing Beijing to consider a two-front dilemma, where a conflict in the Pacific could trigger a maritime blockade in the Indian Ocean, the two nations collectively raise the cost of aggression to a level that outweighs any potential gains. If Beijing were to initiate a kinetic conflict in the Taiwan Strait, the presence of a militarily robust and diplomatically assertive India could compel the PLA to divert significant resources to the Indian Ocean.

The view from Beijing: Preventing the Malacca Trap

Beijing’s sensitivity to India-Taiwan ties is rooted in its fear of the “Malacca Trap” as over 80% of its oil imports pass through the Indian Ocean. If India openly links Taiwan’s security to its own national interests, it disrupts Beijing’s assumption that it can isolate Taiwan as a domestic issue. The most destabilizing scenario for China would be a secondary escalation along the India–China border at the time of potential Taiwan conflict.

From Beijing’s perspective, every time India approaches Taiwan represents that its image of political actor is increased on the international society. And India has not reasserted the “one China policy”, also enhance China’s anxious. Whenever India signals its support for Taiwan’s participation in international organizations or hosts unofficial security delegations, it raises the diplomatic and strategic price Beijing must pay for its aggression.

Chinese strategic discourse has increasingly warned against what is perceived as India’s use of the “Taiwan card” as a source of leverage. From this perspective, New Delhi’s evolving approach—shaped in part by the prolonged border standoff—is seen as an attempt to incrementally expand unofficial ties with Taipei to offset pressure from Beijing. Such developments are interpreted as a form of “salami slicing,” gradually eroding adherence to the One-China principle under the cover of economic, cultural and technological engagement.

Structural Constraints in India’s Taiwan Calculus

Despite the strategic logic underpinning closer Taiwan–India coordination, New Delhi operates under significant structural constraints. India’s long-standing doctrine of strategic autonomy discourages formal alliance commitments, particularly in conflicts that do not directly involve its territorial sovereignty. While India has grown increasingly vocal about developments in the Taiwan Strait, it remains cautious about being perceived as part of an overt anti-China coalition.

Moreover, India’s participation in BRICS and the Shanghai Cooperation Organization (SCO), alongside its continued defense procurement ties with Russia, complicates any overt securitization of Taiwan in its official policy discourse. Despite India-China border tensions, India’s interaction with Taiwan is still shaped by its substantial economic interdependence with China, particularly within critical trade and industrial supply chains. Direct support for Taiwan is structurally constrained by India's unique geopolitical realities vis-à-vis China. Unlike other Indo-Pacific partners, India shares a long and contested land border with China. Strategically, any overt engagement on the Taiwan issue risks being linked to border security, potentially escalating the threat of Chinese retaliation or territorial incursions along the Himalayan frontier. Given that existing defense resources are already stretched by persistent border standoffs, preventing a linked escalation at the LAC is a necessary national security trade-off. Consequently, the focus remains on non-sensitive cooperation in the economic and semiconductor sectors to mitigate potential risks at the border. For India, therefore, the Taiwan question is less about alliance formation and more about calibrated signaling. India is maintaining ambiguity while quietly shaping Beijing’s risk calculations.

Deterrence by Denial as Strategic Risk Management

Taiwan and India are unlikely to formalize a military alliance, nor is such an argument necessary. The objective is to institutionalize Maritime Domain Awareness coordination. By sharing real-time tracking of suspicious vessels and enhancing subsea infrastructure protection, these efforts would incrementally increase the operational costs of Chinese coercion. These initiatives do not seek to challenge China’s core interests or provoke escalation. Instead, they aim to complicate any attempt to alter the status quo by increasing uncertainty, stretching military resources and raising the risks associated with aggression. In this context, strengthening resilience is not a provocation but a necessary mechanism for preserving peace in an increasingly contested Indo-Pacific.

Beijing is likely to view any visible security coordination between Taiwan and India with suspicion. China has consistently reacted to India–Taiwan engagement through diplomatic protests, rhetorical warnings and calibrated pressure along the Line of Actual Control or in multilateral forums. However, such reactions are less about immediate escalation and more about signaling disapproval and attempting to deter further alignment. In strategic terms, even limited cooperation between Taipei and New Delhi sends a signal that the Taiwan Strait cannot be isolated as it can carry regional implications in the Indo-Pacific.

These initiatives are not designed to challenge China’s core interests or provoke escalation. Instead, they communicate a stabilizing message: attempts to alter the status quo will encounter coordinated resilience rather than isolated targets. These measures effectively escalate strategic ambiguity for Beijing while remaining below the threshold of formal alliance commitments. Ultimately, the goal of closer cooperation is not confrontation, but the strengthening of deterrence by denial through practical and calibrated measures.