Cyber Warfare Emerges as Central Pillar of US-Philippines Alliance Amid China's Digital Offensive

The United States and the Philippines are rapidly elevating cyber defense cooperation to a cornerstone of their 75-year-old alliance, responding to what analysts describe as a coordinated and sustained digital offensive by China against Manila. The convergence of recent revelations about Beijing's information warfare campaign and high-level bilateral commitments signals a strategic shift in how Washington approaches deterrence in the Indo-Pacific region.

On February 22, 2026, at the "Navigating Digital Crossroads" cybersecurity forum in Manila, Victor Andres Manhit, President of the Stratbase ADR Institute, publicly characterized the situation as an "unseen war" being waged through information dominance and psychological operations rather than traditional military force. The timing of these revelations, coming just six days after the 12th Philippines-United States Bilateral Strategic Dialogue, underscores the urgency with which both governments are treating cyber threats in the contested Indo-Pacific theater.

Manhit's assessment draws on China's well-documented "three warfares" doctrine, which encompasses psychological, legal, and public opinion warfare. According to the Stratbase analysis, this framework is being implemented through operations designed to undermine Philippine sovereignty by embedding strategic messaging into public discourse and amplifying pro-China narratives across online platforms. The operations reportedly involve coordinated networks linked to China's United Front Work, disseminating strategic narratives through business groups, academic exchanges, and sister-city partnerships.

The threat extends beyond government networks. A recent survey commissioned by Stratbase revealed that a majority of Filipinos view online misinformation as a significant national vulnerability. These legitimate public concerns about corruption, inflation, and governance create exploitable vulnerabilities that can be weaponized to undermine democratic institutions and influence policy outcomes. Philippine Information and Communications Technology Secretary Henry Rhoel Aguda emphasized that technological safeguards alone are insufficient without bolstering institutional credibility and public trust.

The United States response, articulated at the February 16 Bilateral Strategic Dialogue in Manila, demonstrates a comprehensive approach that integrates cyber defense with broader military and economic security cooperation. The joint statement commits both nations to "expand and modernize the Philippines' civilian and military cyber defense capabilities and ability to detect and disrupt cyber threats." This commitment is backed by concrete investments and institutional mechanisms.

Congress appropriated an additional $144 million in Fiscal Year 2026 specifically for infrastructure development at Enhanced Defense Cooperation Agreement (EDCA) sites throughout the Philippines. While these funds are designated for physical infrastructure, the bilateral commitment emphasizes that EDCA sites will serve as hubs for advanced capabilities, including cyber operations support. The dialogue also confirmed continued deployment of cutting-edge missile and unmanned systems to the Philippines, creating a layered defense architecture that integrates kinetic and non-kinetic capabilities.

The strategic significance of cyber cooperation was evident throughout the bilateral dialogue's outcomes. Both sides committed to holding more than 500 military exercises and exchanges in 2024, 2025, and 2026, with cybersecurity integration now a standard component of major exercises like Balikatan. The 2025 iteration of Balikatan, described as the largest and most complex to date, included deployment of the Navy-Marine Expeditionary Ship Interdiction System (NMESIS), demonstrating how the alliance is integrating advanced technologies across domains.

What distinguishes the current US approach is the explicit linkage between cyber defense and economic security. The bilateral dialogue characterized economic security and resilience as "integral to national security," with both sides agreeing to strengthen defense industrial base resiliencies. The Luzon Economic Corridor, a trilateral initiative with Japan, is being developed with energy infrastructure specifically designed to support "joint defense co-production capabilities in strategic sectors" and ensure "resilient energy supplies to enable humanitarian assistance, disaster risk reduction, and other critical operations."

This economic dimension includes a $1.5 million commitment through the State Department's FIRST program to build a Small Modular Reactor control room simulator in the Philippines. While framed as civilian nuclear cooperation, the initiative ensures critical infrastructure resilience that underpins both military operations and cyber defense capabilities. Reliable energy infrastructure is essential for operating the data centers and network architectures required for modern cyber operations.

The cyber threat Manila faces is particularly acute as the Philippines prepares for its 2028 national elections. Analysts warn that foreign interference efforts are already underway to shape digital ecosystems and influence public sentiment. The Stratbase report described a "shadow campaign" targeting Filipino media, influencers, and thought leaders through cyber troops, trolls, and automated bot networks. These operations frequently transcend digital spaces, impacting community discourse, policy debates, and national decision-making processes.

The United States-Philippines response extends beyond bilateral cooperation to include multilateral frameworks. Both countries committed to holding a fourth bilateral maritime dialogue and increasing the tempo of multilateral cooperation with like-minded partners including Australia and Japan. Four secretary-level defense meetings between the United States, Philippines, Japan, and Australia have already been convened to strengthen collective approaches to regional security challenges.

The broader strategic context involves China's coercive activities throughout the South China Sea, which the bilateral statement condemned as "illegal, coercive, aggressive, and deceptive." Both sides reiterated that the Mutual Defense Treaty extends to armed attacks against either country's armed forces, aircraft, and public vessels—including coast guard vessels—anywhere in the Pacific, including the South China Sea. This explicit statement signals that cyber attacks against critical infrastructure could fall within the alliance's mutual defense framework.

As the Philippines assumes the chairmanship of ASEAN in 2026, the cyber defense partnership carries additional regional significance. Both countries committed to close coordination on shared priorities throughout the year, with the United States supporting the Philippines in advancing information integrity and cyber resilience as core components of regional security architecture.

The evolution of cyber warfare as a central pillar of the US-Philippines alliance reflects a fundamental shift in how Washington approaches deterrence in the Indo-Pacific. By integrating cyber defense with traditional military cooperation, economic development, and multilateral security frameworks, the United States is adapting its alliance structure to address 21st-century threats. The challenge ahead lies in translating high-level commitments into operational capabilities that can effectively counter sophisticated information warfare campaigns while maintaining the institutional trust and social cohesion that ultimately determine success in the digital domain.