We
often discuss the Marine Corps and amphibious assaults while noting that the
Navy/Marines are currently unable to even implement an assault that would
adhere to their own doctrine. This is
true enough, however, I suspect that part of our dismay about the Marine’s
assault shortcomings lies in unrealistic expectations. Too many of us, I think, envision the
Normandy D-Day assault and use it as the basis of comparison.
Recall,
though, that D-Day involved the best efforts of multiple nations, required years
to build up the forces and equipment, and required the invention of multiple,
specialized equipment (Hobart’s Funnies, for example, and the Landing Ship
Tank, LST). The ability to conduct D-Day
was not a capability that we entered the war with. We may have, debatably, had the germ of the
concept prior to the war but it took wartime experience to refine and much
effort to assemble and develop the necessary force.
We
also need to firmly keep in mind that D-Day was the ultimate amphibious assault
of all time in terms of scope. We should
not be comparing the Marine’s current capabilities to the D-Day assault and
expecting the Marines to be able to conduct another D-Day at a moment’s notice.
Rather
than looking at the D-Day assault, let’s look at a much smaller assault, Tarawa (Gilbert Islands),
which occurred early in the Pacific
Island campaign. Despite being a smaller assault, the assembly
of forces was still substantial.
The American invasion
force to the Gilberts was the largest yet assembled for a single operation in
the Pacific, consisting of 17 aircraft
carriers(6 CVs, 5 CVLs, and 6 CVEs), 12 battleships,
8 heavy cruisers, 4 light
cruisers, 66 destroyers, and 36 transport ships. On board the transports
was the 2nd Marine Division and
a part of the Army's 27th Infantry Division,
for a total of about 35,000 troops. (1)
A
small portion of the forces were assigned to seize Makin Atoll. The naval force directly assigned to Tarawa included, (2)
Fleet Carriers
6
Light Carriers
5
Escort Carriers
5
Battleships 8
Heavy Cruisers
5
Light Cruisers
2
AA Cruisers 3
Destroyers 43
Minesweepers
2
Transports/Landing Ships 18
The
ground force counted 35,000 troops. By
comparison, a Marine Expeditionary Force (MEF) consists of a Ground Combat
Element of 18,000 troops and an Air Combat Element. (3)
While
it is more appropriate to ask whether the Marines can, currently, conduct a
Tarawa size assault we should note that the pre-WWII Marine Corps and Navy were
not capable of that either. They needed
time to build up to that level.
Okay,
so if we can’t fairly expect the Marines to be capable of even a Tarawa size
assault on day one of a war, what is it that we do expect the Marines to be
capable of? Honestly, I don’t expect the
Marines to be capable of anything on day one.
What I do expect is for the Marines to develop and maintain the
institutional memory and knowledge of two main tasks:
Amphibious Core
Arguably,
the Marine’s main responsibility is to keep the institutional memory of how to
conduct amphibious assaults alive.
Unfortunately, a decade or more of land combat has largely allowed that
memory to fade from existence. Indeed,
in recent years the Marines have begun conducting amphibious assault training
exercises, to some limited degree, and have publicly expressed the need to
“re-learn” how to conduct such assaults which, of course, means that they have
forgotten how. The institutional memory
is gone. This is tragic and will cost
lives somewhere down the road when we have to re-learn the lessons in combat. Allowing the institutional memory to be lost
is unforgivable and many Marine leaders, current and recently retired, should
live with the shame of that failing.
Setting
aside blame, what is required from the Marines is to maintain and exercise a
core of amphibious capability and knowledge which can be used to build a much
more extensive wartime capability if/when needed.
This
also suggests that maintaining a peacetime amphibious fleet of 33 ships or so
is unnecessary. If all the Marines need
to do is to maintain the institutional memory, that can be accomplished with
just 6-9 amphibious ships – basically, just a few ships conducting training exercises
(institutional memory) or undergoing maintenance. When war comes, we can build more amphibious
ships, if needed. This, in turn,
suggests that we need a far more basic, cheaper amphibious ship design that we
can build quickly during war. A modified
commercial ship is adequate for troop and cargo transport. Our current big deck aviation/amphibious
ships are far too large and far too expensive for rapid wartime construction.
Port Seizure
A
subset of general amphibious capability is port seizure and it is this which I
consider to be the Marine Corps’ main mission.
We’ve discussed the challenges presented by an over-the-beach amphibious
assault and noted that the logistics, in particular, are currently unlikely,
bordering on impossible. With that in
mind, the only way to currently insert a large force into a hostile area is via
a port. Only ships can transport the
required mass of materiel and ships must have a functioning port. The fantasy of moving an entire invasion
force and all its follow on materiel through Mobile Landing Platform (MLP or
whatever the Navy’s label of the day is) ‘sea bases’ is just that, a
fantasy. We’ll need a port and if a
nearby, friendly port is not available then we’ll have to seize one. That, after all, was the immediate objective
of the Normandy D-Day assault – to seize the ports of Cherbourg and Le Havre through which would pour the
millions of tons of subsequent supplies for the assault on Germany.
As
with general amphibious assault, I don’t expect the Marines to have everything
they need to conduct a major port seizure on day one of a war. What I do expect is for the Marines to have
the institutional knowledge about how to conduct a port seizure along with
detailed plans and equipment lists that can be realistically and readily implemented
when war comes.
Conclusion
Unfortunately,
the Marines have lost the institutional memory of how to conduct general amphibious
assaults and they never had any knowledge about port seizure. Peacetime is the golden opportunity to
practice these capabilities and develop the required institutional
knowledge. Unfortunately, the Marines
are practicing neither capability. The
occasional, extremely limited, small amphibious exercises the Marines do
conduct are so unrealistic as to be worse than worthless – worse, because they
develop bad habits and false confidence.
In
summary, I don’t fault the Marines for not being able to conduct a D-Day or
Tarawa assault on day one of a war but I do fault them for not knowing how and
not having detailed plans and equipment acquisition lists ready to go. With this in mind, we can see that day one
capabilities are a red herring. What’s
more important is ‘day two’ capabilities after you’ve had a chance to build up.
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(1)Wikipedia,
“Battle of Tarawa”, retrieved 28-Aug-2018,
https://en.wikipedia.org/wiki/Battle_of_Tarawa#American_order_of_battle
(2)Wikipedia,
“Gilbert Islands Naval Order of Battle”,
retrieved 28-Aug-2018,
https://en.wikipedia.org/wiki/Gilbert_Islands_Naval_Order_of_Battle#TF_53_Southern_Attack_Force_(Tarawa)
(3)Global
Security website, note – the table of data is not completely current but serves
as an indicator,
https://www.globalsecurity.org/military/agency/usmc/mef.htm