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John Schmitt recently provided considerable evidence of the strategic, operational, and tactical weaknesses of the Marine Corps’ Stand-in Forces (SIF) concept. But it is worth exploring in greater detail one fatal flaw: survivability.

The fundamental premise of the SIF concept is that the Chinese military’s ability to sense and engage U.S. forces is so advanced that, in the event of hostilities, U.S. Navy warships will be unable to enter China’s weapons engagement zones. Thus, the Navy will be incapable of preventing Chinese warships from sallying out from the East and South China Seas and past the First Island Chain, allowing China to threaten vital areas across the Pacific.  To counter this postulated dilemma, the Commandant of the Marine Corps offers SIFs of small “low-observable” Marine units armed with antiship missiles. They are to occupy positions within the First Island Chain before the commencement of hostilities so that if a war breaks out, they are in positions to engage enemy warships as they attempt to deploy. 

Because SIF detachments will be widely distributed and unable to reinforce each other, their survivability will depend almost entirely on their ability to remain undetected. The concept suggests that the SIF is less detectable and survivable than U.S. Navy warships. A cursory comparison of SIFs and Arleigh Burke destroyers, which likely would be the Navy asset to have the same mission envisioned for SIFs, renders this claim highly questionable.

According to the concept, SIFs, as noted, are to be low-observable (but not necessarily invisible), a term meaning stealthy and thus less visible to radars, electro-optical sensors, sonars, and other detection methods. But there is nothing stealth-like in the equipment of a SIF.  For example, the missile unit that is the raison d’être of the SIF consists of box-shaped Joint Light Tactical Vehicles (JLTVs), each with two attached missile launchers; other JLTVs configured for long-range command, control, and communications; and supporting trucks with trailers. Supporting the missile unit will be elements of an infantry battalion (without supporting arms), an air- and missile-defense detachment (currently with only short-range air defense weapons), and a logistics detachment with a myriad of equipment that is hardly low-observable and in some cases emits considerable electronic signatures. 

Marine Lance Cpl. Andrew Mcdonagh sets up a defensive position during an Expeditionary Advance Base Operation exercise in Okinawa, Japan, June 17, 2020. (Cpl. Donovan Massieperez/U.S. Marine Corps)

Even discounting electronic signatures, the thing that will make SIFs most detectable may be contact with local populations and militaries, which the concept envisions. Ships have no such drawback.

Beyond the survivability of the SIF itself, two of the primary means for inserting, displacing, and withdrawing a SIF cannot survive inside of an enemy’s weapons engagement zone: Marine Corps C-130 transports and CH-53 helicopters are not designed to survive in such a zone; they will be easy prey to a variety of enemy weapons.  

Confronted with these facts, proponents argue that SIFs achieve low observability by operating in “penny packets.” The smallest size one of these so-called penny packets could achieve is a missile section consisting of five JLTVs with two supporting trucks and trailers, not counting a necessary security element, minimal air- and missile-defense capabilities, and a basic logistics support team. The missile section alone will certainly not be low observable by any reasonable person’s definition. (Interestingly, Field Marshall Bernard Montgomery prompted the common use of the term “penny packet” in World War II when he used it to denigrate the parceling out of airpower in elements too small to be of operational value while also too many to protect.)

How does a SIF compare to an Arleigh Burke-class destroyer in terms of detectability? It doesn’t. Where the SIF has only rudimentary means of hiding or shielding itself from an enemy, the destroyer has a variety of radars and a sonar for detecting an enemy before being detected, an electronic warfare decoy system for jamming and drawing enemy weapons away from the ship, a torpedo countermeasure system, and CHAFF buoys.  

The destroyer USS Paul Ignatius transits the Atlantic Ocean on June 12, 2021. (Navy Petty Officer 2nd Class Nathan T. Beard/US Navy)

The Commandant touts the planned light amphibious warship (LAW) as a primary means of moving SIFs. The LAW is not likely to have any low-observable characteristics, making it extremely susceptible to being detected by Chinese sensors. If the Navy were to build the LAW to Navy Sea System standards of survivability, acquiring thirty or more vessels would be too expensive. 

For a SIF to pack up, move to, and board a LAW will take hours. The LAW will have a maximum speed of advance of 14 knots (16.11 mph). It will have minimal self-defense weapons consisting of a 30mm gun system and a .50 caliber machine gun. Yet, the Navy is to sail this ship where its destroyers won’t venture?   On the other hand, an Arleigh Burke destroyer has a 5-inch gun, two 20mm close-in weapons systems, two 25mm Bushmaster chain guns, antiair and anti-ship missiles, and torpedoes. The ship can advance at 31 knots (35.7 mph).  I suggest that the signature of the SIF and the disparity of weapons make it far more detectable and far less survivable than a U.S. Navy destroyer.  And we have not even considered the ideal platform suited to this mission and is far less detectable and more survivable than the SIF or the destroyer:  an attack submarine.

In essence, those who conceived the SIF concept are arguing that an operational commander should place Marine SIFs — with a marginal ability to avoid detection and to protect themselves — in areas near where U.S. Navy ships with systems to disguise their location, divert enemy weapons, and protect against attack dare not go because of the enemy’s extraordinary surveillance and targeting capability. The illogic of the SIF concept could only be offered by technologically and operationally uninformed officers.

If the Marine Corps were to bring this concept to fruition and future commanders employed SIFs as designed, there could only be one result — many dead and captured Marines. Continuing along this force development path, with divestments already underway, makes little operational sense. The Corps and the nation will be better off when the current Force Design 2030 folly ends — although less well off than before it started. 

The Marines should be prepared to take on the nation’s foes in “any clime and place” rather than wannabe missileers stranded, vulnerable, and unable to survive on forgotten Pacific islands. Fourth Marines are currently being reconfigured as a SIF. I fear that storied regiment may once again be heading into ignoble confinement similar to its Second World War experience as the original SIF in 1941.

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Lt. Gen. Jefferson D. Howell (Ret.) served as a Marine for over 37 years and commanded both the 2nd Marine Aircraft Wing and Marine Forces, Pacific.

Lt. Gen. Frank Libutti (Ret.) was a Marine infantry officer for over 35 years, was awarded the Silver Star for actions in Vietnam, and commanded both the 1st Marine Division and Marine Forces, Pacific.

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