China fired a ballistic missile from a nuclear-powered submarine into the southern Pacific on Monday, demonstrating capabilities that analysts say could fundamentally reshape the balance of power in a region where millions live within range of Beijing's expanding arsenal. The test drew immediate criticism from regional powers and prompted the U.S. to confirm it was an intercontinental ballistic missile.
The launch, which occurred just four days ago, marks China's most significant long-range ballistic missile test since September 2024, when the People's Liberation Army fired a weapon into the southern Pacific Ocean from a mobile launcher on Hainan Island. Chinese state media and officials described the test as "routine" military drill that wasn't directed at a specific target or country. But regional military attaches and security analysts said the test showcased some of the most closely watched elements of China's ongoing military modernization.
Nuclear Deterrent Expansion
The missile was fired from one of China's six Type-094 nuclear-powered submarines, known as SSBNs, according to analysts and academics. State media confirmed it was a strategic missile submarine but didn't identify the class. An SSBN is a large nuclear-powered submarine designed to launch nuclear-armed intercontinental ballistic missiles—a capability that only a handful of nations possess.
China's SSBN operations, based out of Hainan Island, represent a critical component of its nuclear deterrent strategy. If these nuclear-armed submarines can operate undetected, China can strike back if its more extensive land-based weapons are destroyed in a first strike by an adversary. This second-strike capability is particularly important for Beijing, which maintains an official policy that it won't be the first to use nuclear weapons in a conflict.
Surveillance and Strategic Concerns
The U.S. and its allies routinely attempt to track Chinese submarines through naval vessels, networks of underwater sensors in key chokepoints, and air patrols with P-8 Poseidon aircraft equipped with advanced maritime surveillance devices, military attaches and analysts said. Such operations are expected to increase as China's capabilities grow—a development that raises the stakes for millions of people living in countries across the Indo-Pacific region.
A Pentagon report in 2022 said China had begun operating near-continuous deterrence patrols with its SSBNs, joining the U.S., Russia, France and Britain, which have for decades routinely deployed such nuclear strike capabilities. India is now developing its own SSBNs as well.
Questions About Operational Readiness
A study released this week by the Bulletin of the Atomic Scientists, a Chicago-based research organization, raised significant questions about whether China's submarines actually carry nuclear warheads on patrol. While U.S. officials haven't publicly stated that China's SSBNs are armed with nuclear weapons on such patrols, some U.S. officials have said it to the study's authors privately.
The study noted that "President Xi Jinping's purge of military officials—including leaders of the People's Liberation Army's rocket force—make it seem unlikely that nuclear warheads would be handed over to the military under normal circumstances." This uncertainty adds another layer of complexity to regional security calculations.
Technical Capabilities and Limitations
While the exact location of Monday's submarine missile launch and the precise missile used haven't been confirmed, the ability of China's SSBNs to maneuver undetected beyond its coasts will be closely scrutinized. The Type-094 submarine will eventually be replaced with a more advanced, quieter version now under development, analysts said.
To reach the continental United States with its most advanced submarine missile, the JL-3, a submarine would have to move beyond the South China Sea into the western Pacific, potentially risking exposure to rival navies. The JL-3, which is believed to be armed with multiple warheads and was showcased in a military parade in Beijing in September 2025, has a range of 10,000 km (6,214 miles).
In response to Reuters' questions on Friday, the Chinese defence ministry said the test was made in accordance with international law and practice and dismissed some reports as "pure distortion and hype." It said: "It should be emphasized that China's efforts to modernize its nuclear forces are intended to safeguard national strategic security and maintain global strategic stability."
China's Global Times newspaper said the missile launch showed how China was continuously strengthening its "nuclear triad" of strategic forces—the ability to fire nuclear weapons from land, sea and the air. Its editorial said: "This will compel external powers and their followers to abandon attempts aimed at forcing Chinese concessions through maximum military pressure or pre-emptive strikes, thereby fundamentally reducing the risk of large-scale conflict..."
Why This Matters:
The expansion of China's submarine-based nuclear capabilities has profound implications for regional security and the lives of millions across the Indo-Pacific. As Beijing develops the ability to launch nuclear weapons from harder-to-detect platforms, neighboring countries face heightened uncertainty about their own security. The test underscores the urgent need for transparent communication channels and multilateral frameworks that can reduce the risk of miscalculation in a region where nuclear-armed powers operate in close proximity. Questions about whether these submarines actually carry nuclear warheads on patrol—and the recent purges of military officials—add layers of unpredictability that make diplomatic engagement and verification mechanisms even more critical. For countries without nuclear arsenals, the arms race represents a diversion of resources that could otherwise address pressing human needs, while the environmental risks of increased submarine operations in shared waters affect fishing communities and maritime ecosystems that millions depend upon for their livelihoods.