As the US Navy moves to deploy thousands of unmanned surface vessels in the Indo-Pacific, questions are mounting over whether these drone swarms can deliver meaningful combat and deterrent effects against China.
This month, USNI News reported that the US Navy is looking to field thousands of unmanned surface vessels (USVs) in the Indo-Pacific by 2030 to strengthen deterrence against China.
At the Navy League’s Sea-Air-Space Symposium in National Harbor, Maryland, Captain Garrett Miller, head of Surface Development Group One, said the initiative will include over 30 medium unmanned surface vessels (MUSVs) and thousands of smaller USVs, alongside unmanned aerial systems (UAS) operating from both crewed and uncrewed ships, based on projected operational requirements through 2045.
The move aligns with the US Indo-Pacific Command’s (INDOPACOM) “hellscape” concept, which envisions swarms of autonomous systems to defeat and deter Chinese military actions, including a potential invasion of Taiwan.
Drawing partly on Ukraine’s use of maritime drones against Russia and recent Middle East operations, the US Navy aims to adapt such tactics for the Pacific, though officials cautioned that vast distances and open-ocean conditions pose challenges compared to confined seas.
Rear Admiral Douglas Sasse noted that Indo-Pacific operations will require more innovative approaches. Recent tests, including autonomous refueling of a medium USV, underscore progress, while deployments alongside carrier strike groups are expected to enhance surveillance, flexibility and maritime domain awareness.
The planned large-scale deployment of USV swarms in the Indo-Pacific raises questions about their effectiveness at the tactical, operational, and strategic levels in enhancing combat performance and deterrence against China.
At the tactical level, USV swarms derive their effectiveness from overwhelming defenses, exploiting cost asymmetry, and sustaining pressure to degrade combat endurance.
Scott Savitz notes in a January 2023 RAND article that explosive USVs can strike ships by massing in swarms and approaching from multiple angles, making them difficult to detect and intercept.
Savitz says these USVs can strike the waterline with payloads larger than comparably sized missiles or uncrewed aircraft, potentially inflicting devastating damage. He adds that even one or two USVs penetrating defenses would constitute mission success.
Furthermore, Rudraksh Pathak notes in a March 2026 article for the Center for International Maritime Security (CIMSEC) that autonomous systems achieve effectiveness by exploiting cost asymmetry and defensive saturation, creating an “interceptor trap” in which defenders are forced to expend scarce, high-value missiles against low-cost targets, eventually depleting their magazines and compelling withdrawal.
He adds that such systems do not need to penetrate defenses perfectly; they only need to force defenders to use their most capable weapons against low-value targets, degrading operational tempo and endurance over time.
Together, these dynamics suggest that USV swarms are less about decisive strikes than cumulative degradation of defenses.
Drawing on tactical lessons from the Iran war, Kateryna Bondar notes in a March 2026 article for the Center for Strategic and International Studies (CSIS) that drone campaigns are effective because they generate sustained pressure at relatively low cost, allowing actors to impose economic, psychological, and operational strain while preserving higher-end missile assets.
She highlights that Iran’s campaign followed a two-phase pattern—an initial large-scale saturation wave followed by a steadier, sustained tempo of strikes over several days—demonstrating how drones function as a persistent campaign tool rather than a one-off strike asset.
In a Taiwan Strait scenario, USV swarms could challenge the People’s Liberation Army Navy’s (PLAN) defenses and drain their operational endurance with costly attacks. Their success hinges on resilient targeting and communication but may be limited by range and layered Chinese defenses.
Yet tactical disruption alone does not guarantee operational success, as battlefield effects must be translated into coordinated force employment. At the operational level, USV swarms hinge on integration into existing naval formations and broader joint and allied frameworks.
George Galdorisi, in a February 2026 CIMSEC article, describes incorporating USVs into a hybrid fleet through man–machine teaming, where uncrewed and crewed platforms operate as a coordinated, synergistic force.
He highlights the use of large USVs as “trucks” to transport and deploy smaller USVs, unmanned underwater vehicles (UUVs), and unmanned aerial vehicles (UAVs) into contested areas.
He adds that this approach enables distributed operations while allowing crewed ships to remain out of range of adversary anti-access/area denial (A2/AD) systems, provided they are supported by robust command-and-control.
Furthermore, Thomas Clare notes in a November 2025 Center for Strategic and Budgetary Assessments (CSBA) report that USVs have proven effective at enabling sea denial and extending operational reach, but their employment is constrained by factors such as range, control links, and the need for supporting infrastructure.
He suggests that USVs are best used as part of a broader attrition-and-distributed-operations campaign rather than as standalone solutions, highlighting both their potential and their limitations.
Considering Taiwan Strait operations, USVs would serve as forward-deployed, networked extensions of manned forces, supporting distributed, multi-domain operations from standoff ranges. Their effectiveness depends on resilient command links, ISR integration, and access to forward-positioned systems. Even so, effective employment at scale depends on more than force structure.
Beyond operational integration, their broader value lies in shaping strategic deterrence by influencing how adversaries assess risk and assess their own success.
Xidi Chen and Lun Li note in a February 2026 Frontiers in Political Science article that unmanned maritime vehicles offer advantages such as low cost, potential for mass deployment, long endurance, and the avoidance of personnel casualties, enabling states to enhance maritime situational awareness and reshape patterns of maritime competition.
They add that these characteristics enable small and medium-sized states to narrow capability gaps in specific operational areas and to strengthen their ability to achieve area denial and deterrence.
They further argue that the unmanned nature of these systems reduces personnel risks, easing political and public constraints and expanding leaders’ strategic freedom of action. This shifts deterrence from high-end punishment to persistent, theater-specific pressure.
Furthermore, Christopher Knight argues in a September 2024 Proceedings article that unmanned systems can support deterrence by enabling theater deterrence, defined as the deployment of sufficient localized combat power within a specific geographic area to make an adversary question whether its intended operation will succeed.
He notes that, unlike nuclear deterrence, which operates at the high end of the conflict spectrum, unmanned systems can be tailored to specific operational problems and deployed forward to help counter capabilities such as China’s A2/AD approach.
He emphasizes that their deterrent value depends on organizing, testing, proliferating and visibly demonstrating these systems to influence adversary calculations before conflict.
USV swarms can boost deterrence by offering flexible, forward-deployed capabilities that challenge Chinese planning and raise doubts about invasion, but their impact relies on credible integration and clear demonstration to sway China’s decisions before conflict.
Ultimately, USV swarms will matter less for their scale than for whether they can be turned into credible, networked combat systems that contribute to a larger operational framework and shape adversary perceptions for deterrence.
