China’s second aircraft carrier, CNS Shandong, passed through the Luzon Strait in spring 2025 with two warships in escort, conducting sustained flight operations that shattered previous deployment records. The 70,000-ton vessel launched and recovered J-15 fighter jets at unprecedented rates just beyond Philippine territorial waters, marking Beijing’s boldest assertion of naval power in waters long dominated by American military presence. The deployment answered a question that had preoccupied Asia-Pacific defense planners for months: how would China respond to the United States military’s spring maneuvers in the Philippines?
For seven decades, the “first island chain” stretching from Japan through Taiwan to the Philippines served as an invisible containment barrier against Chinese naval expansion into the Pacific. American military strategists relied on bases in Japan, Taiwan’s proximity, and Philippine geography to limit Beijing’s access to open ocean. Chinese carriers operated cautiously near Taiwan or within the South China Sea, respecting this unspoken boundary. The Shandong’s passage rendered that strategy obsolete, demonstrating that China could project carrier-strike power into the western Pacific whenever it chose.
The deployment carried immediate strategic weight. US military observers tracked the carrier as it conducted operations in the Philippine Sea, operating in waters deeper than any previous Chinese carrier mission. The carrier strike group included the Type 055 destroyer CNS Yan’an and electronic surveillance ship CNS Tianguanxing. Together, they executed approximately 130 carrier operations during the transit, launching fighter jets and recovering helicopter sorties within the Philippines’ 200-nautical-mile Exclusive Economic Zone. The operations were technically lawful under international maritime law but unmistakably provocative.
The Spring Maneuver That Changed Everything
The catalyst arrived in April 2025 during Balikatan, the largest joint US-Philippine military exercise on record. Some 17,000 troops deployed to the Philippines, including 260 Australians joining American forces. The 3rd Marine Littoral Regiment brought precision strike systems to Batan Island in the Batanes archipelago, positioning the Navy-Marine Expeditionary Ship Interdiction System just 100 miles from Chinese territorial waters. For the first time, American anti-ship missiles stood in the Luzon Strait itself.
NMESIS represents a fundamental shift in maritime warfare. The system, mounted on Joint Light Tactical Vehicles, carries Naval Strike Missiles with ranges exceeding 100 nautical miles. Unlike traditional anti-ship weapons requiring large warships, NMESIS operates from dispersed island locations or coastal terrain. Positioned on Batan Island, it created what American military doctrine calls “sea denial,” threatening any approaching Chinese vessel without needing aircraft carriers or capital ships. China’s military planners understood immediately that the Luzon Strait was no longer an open highway.
The US commitment extended beyond temporary exercises. On October 31, 2025, the Pentagon announced the US Joint Task Force-Philippines, the first permanent joint command structure in Southeast Asia. Led by a one-star officer with 60 dedicated staff in Manila, the task force signaled sustained American deterrence operations. Units from the Army’s 25th Infantry Division, Marines from the 3rd Marine Littoral Regiment, and Air Force personnel began rotating through the Philippines in what became a quasi-permanent forward deployment.
Regional Powers Caught Between Giants
For approximately 117 million Filipinos, the standoff transformed from abstract geopolitics into immediate reality. American missiles now stood on Batan Island, roughly 100 miles north of the Luzon mainland; Chinese carrier jets flew within 200 nautical miles of Filipino territory. Manila walked a diplomatic tightrope, publicly welcoming US military posture as deterrence while seeking dialogue with Beijing. Philippine coast guard vessels had clashed with Chinese ships over contested waters months earlier, deepening local security concerns.
Vietnam watched with parallel anxieties. Vietnamese defense analysts recognized that NMESIS deployment signaled a hardening US posture across Southeast Asia. The Shandong’s response demonstrated Beijing would not accept military encirclement. Hanoi increased defense spending, deepened military ties with India and Japan, and expanded port access for US naval visits.
Japan shifted from observer to active participant. Japan Maritime Self-Defense Force destroyers increased patrols east of Luzon, tracking the Shandong and providing surveillance intelligence to US forces. Tokyo announced expanded defense spending and accelerated its carrier-style destroyer program while deepening coordination with Australia and South Korea. What began as a bilateral US-Philippines alliance evolved into a multilateral security architecture spanning the region.
The Equilibrium Question
As 2025 closed, neither superpower showed signs of de-escalation. Both nations appeared locked into a new operational standard: sustained carrier operations, forward-deployed missiles, and routine military exercises in overlapping zones of claimed influence. Beijing coordinated the carrier deployment to avoid direct confrontation with US forces, operating within the legal gray area of the Philippine Exclusive Economic Zone while avoiding territorial waters. The USS Nimitz conducted parallel flight operations in the Philippine Sea, affirming American commitment to allies and freedom of navigation.
The standoff was not a crisis resolved but an opening move in a strategic competition that promises to define the Indo-Pacific for years ahead. The question facing military strategists is whether this high-tension balance can be maintained indefinitely without incident. How many more times can Chinese carriers transit contested waters before a miscalculation, navigation error, equipment malfunction, or pilot misjudgment sparks unintended confrontation? The answer will shape regional security and global power dynamics well into the coming decade.
Sources
USNI News strategic analysis, Nov 2025; Council on Foreign Relations reports; Stimson Center assessments; RAND Corporation Indo-Pacific strategy papers
USNI News strategic analysis, Nov 2025; Council on Foreign Relations reports; Stimson Center assessments; RAND Corporation Indo-Pacific strategy papers
US Navy official statements, Nov 2025; US 7th Fleet communications; PACOM press releases
US intelligence community assessments; Chinese PLAN doctrine papers analyzed by USNI; reporting from Strait of Taiwan scholars