Compass Points - SIF Missing?
Where are the Marine SIF units?
Compass Points - SIF Missing?
Where are the Marine SIF units?
March 13, 2026
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The US Marine Corps for a half-dozen years has made presentation after presentation about the special capability it was building: the Stand-in-Force. The SIF would be the premier sensor and missile capability for any future missile war. In any future missile war, it was repeatedly claimed, the Marine Corps Stand-in-Force would be a critical joint asset.
The missile war is here. Where are the Marine SIF units?
As the US massive missile war continues, the defense publication, The Debrief, reports that the conflict is entering Phase II.
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The first week of the U.S.-Iran war has been defined by speed, reach, and taking away Tehran’s ability to see, to command, and to strike back in volume.
Now, multiple indicators suggest the U.S. and Israel are moving beyond the opening “shock-and-awe”—and into a phase aimed at causing more enduring destruction of Iran’s military capabilities. The new priority appears to be Tehran’s defense-industrial backbone, especially the facilities and supply chains that let it keep building ballistic missiles and drones.
This shift matters because it changes what “success” looks like. Phase one was about blinding and disorienting Iranian forces while suppressing immediate retaliation.
Phase two, if it unfolds as current reporting suggests, is about preventing Iran from regenerating its most dangerous capabilities over months and years—turning a fast-moving air campaign into a sustained effort to dismantle production capacity, not just fielded systems.
“We’re not just hitting what they have, we’re destroying their ability to rebuild,” Commander of U.S. Central Command, Navy Admiral Brad Cooper, said in a press conference on March 5. “And so, as we transition to the next phase of this operation, we will systematically dismantle Iran’s missile production capability for the future, and that’s absolutely in progress.”
-- The Debrief
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Commander of U.S. Central Command, Navy Admiral Cooper, is commanding Operation Epic Fury. More than any other person, he is responsible for US military success. With that responsibility comes the authority to reach out across the US military and get any military asset he needs. If Admiral Cooper wants a particular type of jet, or ship, or sub, he gets it. Whatever will help him win in Iran, it is all available to him.
Has Admiral Cooper considered the usefulness of the Marine Stand-in-Force? The SIF has been studied and celebrated by some academics and think tanks. For example, CIMSEC has long been an advocate for the SIF.
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Nonetheless, the joint force will still require the ability to contest Chinese all-domain control in the first island chain. Enter the stand-in force, positioned on forward locations throughout the battlespace. Fighting as an extension of the fleet and joint force, the stand-in force will leverage disaggregation to create reconnaissance and targeting dilemmas for adversaries reliant on precision strike regimes. Stand-in forces will employ asymmetric capabilities and tactics to hold adversaries at risk in multiple domains, ultimately preventing the accumulation of regional superiority.
. . . To deliver on its value proposition, the stand-in force must retain the capability to hold the adversary at risk with credible killchains in contested environments when the rest of the joint force cannot. When CJADC2 is uncontested and operating at its peak it will make extensive use of C2 platforms in the air and space domains. However, the questionable survivability and persistence of these platforms is in part the impetus of the stand-in force concept. Thus, reliance on these high-end joint networks introduces a contradiction in the stand-in force’s conceptual framework.
-- CIMSEC
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In the planning leading up to the start of Operation Epic Fury, did Admiral Cooper take a moment when he and his staff were deciding what units they would need? Did the Admiral ask his staff about the Marine SIF and its ability to provide, “asymmetric capabilities and tactics to hold adversaries at risk in multiple domains”?
Did his staff say, “Sir, the Marine SIF is designed for use against China in the Pacific.”
Did the Admiral reply by pounding the table and bellowing, “ I don’t care. The Marine SIF units are the greatest sensor and missile units in the world, and we must have them for the fight against Iran!”
Apparently Admiral Cooper did not say that. Admiral Cooper did not demand the Marine SIF units.
For a half-dozen years, the Marine Corps has struggled to build a new capability, the sensor and missile Stand-in-Force that would be crucial in a missile war. The missile war is here, but the Marine Corps has virtually zero operational SIF capability to contribute.
Over many decades, the Marine Corps has served the Nation well through its forward deployed, combined arms MAGTFs. A Marine MAGTF is an air, ground, logistics force under a single commander. A MAGTF can range in size from 2,000 Marines or smaller, to 40,000 Marines and larger. A Marine MAGTF can be tailored and sized for the mission and the region. Need more drones and missiles? Simply add to the MAGTF. Need more armor and artillery? Simply add to the MAGTF. Need special gear for hot weather or cold weather? Add what is needed. Best of all the MAGTF is always in the process of being upgraded and enhanced. It never stands still. The Marine MAGTF is always experimenting with and adopting the newest weapons and equipment. In peacetime, in wartime, and anytime in between, a Marine MAGTF can arrive quickly to a crisis to deter, assist, rescue, strike, and fight.
For decades the Marine MAGTF has proven itself in real world conflict and crises. The Marine Corps Commandant recently reported that the joint Combatant Commanders have expressed an ongoing need for more than five Marine MAGTFs always deployed around the globe.
It is unfortunate that the Marine Corps has given up much of its global MAGTF force in a heedless pursuit of the once celebrated SIF. The missile war is here. Where are the Marine SIF units?
Compass Points salutes Admiral Cooper and all the service members from every service now pressing the fight in Operation Epic Fury.
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The Debrief - 03/06/2026
U.S.–Israel Campaign Against Iran Shifting to “Phase Two”—Here’s What Comes Next
By Tim McMillan
https://thedebrief.org/u-s-israel-campaign-against-iran-shifting-to-phase-two-heres-what-comes-next/
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CIMSEC - 10/14/2024
Building Resilient Killchains for the Stand-In Force
By Aaron Barlow, Patrick Reilly, and Sean Harper
https://cimsec.org/building-resilient-killchains-for-the-stand-in-force/
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Even if he asked he could not get such a unit. Only parts and pieces exist. No complete unit has been fielded. Six years ago the Corps could have begun to create such a unit and eventually demonstrate a capability. Gen Berger decided to divest to invest ( a flawed understanding of how Congress appropriates funds) and jumped off of the horse before having a unicorn to mount. For six years the Corps has been irrelevant to national defense. There is no unicorn to ride and no money to buy a new horse.
As the official spokesman for Force Design, I must say "1) the real merits of SIF for the current fight are both classified and still being developed as part of our campaign of learning. 2) Those who criticisize SIF and Force Design in general, clearly have their thought process mired in a quest to resurrect legacy systems such as flintlock muzzle loaders and stiff leather collars. 3) Moreso, data from the conflict in Ukraine demonstrably shows the effectiveness of the NMESIS system. 4) If you disagree, you are clearly on the payroll of a defense contractor (such contractor may or may not be managing contracts supported under the FD initiatives since 2020). "