Marine Stand-In Forces have emerged as a focal point in U.S. Marine Corps planning, and the concept is drawing notable concern from Chinese naval analysts who see the small, missile-equipped units as a growing challenge in the Pacific.
Over recent years, the Marine Corps has moved to reconfigure itself for dispersed, small-unit expeditionary operations, a shift that has prompted criticism from traditionalists who fear the service could lose key capabilities. Yet according to a U.S. Navy translation of a 2023 Chinese military journal article, some Chinese officers view the prospect of confronting Marine Stand-In Forces, or SIF, on island terrain as worrisome.
Chinese concerns over Marine Stand-In Forces concept
The translated article states that the Marine Corps’ steady refinement of the SIF model could chip away at China’s advantages in sea denial, complicate any effort to break through island chain blockades, accelerate the depletion of Chinese combat resources, and make the operating environment more complex. The authors, Senior Captains Yue Zhiqiang, Wang Li and Li Jinqia, wrote in the journal Military Art that the perceived threat is real and calls for a proactive response.
SIF units are central to Force Design 2030, first unveiled in 2020. Instead of large, mechanized formations reminiscent of World War II, Korea, and Vietnam, the plan envisions light infantry teams operating from Pacific islands. Outfitted with sensors and missiles, these teams would track and disrupt Chinese naval movements while feeding surveillance and targeting data to U.S. naval and air forces.
American detractors argue the approach risks leaving small detachments isolated and vulnerable. Chinese assessments, by contrast, describe SIF elements as key tools for deterrence and containment along China’s periphery that could maintain a steady presence in nearby seas.
The Chinese analysis singles out concerns about Marine littoral forces employing both missiles and unmanned underwater vehicles. In a crisis or conflict, the authors write, SIF units could deploy large UUVs or use submarines to release smaller ones to loiter near shipping lanes, enabling covert ambushes or suicide attacks against undersea forces and larger vessels.
The article recommends that the People’s Liberation Army Navy prioritize striking Marine Stand-In Forces early in any regional confrontation. To counter the USMC concept, it urges a forward-leaning posture, expanding operational reach, projecting forces ahead, and applying countermeasures at the source. That would include pushing undersea combat capabilities as far forward as possible and developing undersea prepositioned weapon systems.
Broader surveillance is also advised, including improved use of radar, satellites, underwater sensors, and patrol aircraft. The authors call for tighter integration of military, paramilitary, and civilian fleets to remedy what they describe as fragmented and inefficient coastal surveillance.
The analysis notes that China’s large commercial fleet could be used for maritime deception to saturate Marine Stand-In Forces with information and blunt their capabilities. To offset unmanned U.S. platforms, the authors advocate investing in low-cost Chinese drones and fielding counter-drone lasers and microwave systems. They caution against expending high-value assets on lightweight targets.
The piece further argues that the command and control networks linking SIF units should be prime targets. It urges leveraging cyber and electromagnetic tools to paralyze U.S. maritime command and control.
The Military Art article reflects enduring Chinese concerns about U.S. posture in the Pacific and how small, dispersed units and drones might force China to divert resources or expose key assets to long-range targeting, according to Lyle Goldstein, director of the China Initiative at Brown University’s Watson Institute. He noted the emphasis on undersea warfare and the vulnerability of Chinese submarines, adding that the authors place significant weight on UUVs and undersea acoustic detection arrays positioned off major ports and waterways.
Some of the undersea and unmanned concepts discussed by Chinese analysts echo capabilities seen in emerging Western systems such as Seavex and Subvex. The debate underscores how rapidly evolving drone and sensor technologies are reshaping expectations for a future conflict at sea.
Analysts also note that the U.S. Marine Corps’ evolving Force Design 2030 and its integration with the broader U.S. Marine Corps modernization effort will likely continue to draw close scrutiny from Chinese planners. For Beijing, understanding how these dispersed units might support the wider U.S. defense posture in the Indo-Pacific is increasingly central to long-term military planning.