ComNavOps is currently
reading the book, D-Day June 6, 1944: The Climatic Batle of World War II,
by Stephen Ambrose. The book is quite
extensive at over 600 pages and is more of an oral history than a pure academic
study, however, there are strategic and tactical lessons packed in throughout
the book if one reads between the lines and can do a bit of self-assembly of
the events and lessons.
Here are some tidbits from the book that offer
lessons relevant to today’s amphibious assault concerns.
Discussing the concept
of defense of the western European coast from the anticipated Allied amphibious
invasion, Field Marshal von Rundstedt, Western European Commander, argued
against dependence on fixed fortifications.
“He argued that the Germans should hold their
armored units well back from the coast, out of range of Allied naval gunfire,
capable of mounting a genuine counteroffensive.”
This was a potentially
devastating strategy that the Germans failed to implement thanks in large
measure to Hitler and Rommel's personal obsession with fortification
defenses. This strategy offers a warning
to us, today. A peer defender will,
undoubtedly hold back reserves and we must be prepared to deal with them. Simply winning a foothold on the beach (or
inland location in the case of vertical assault) is not enough. Just as there will be defense in depth, so
too must there be the ability to apply offense in depth. We must be prepared to
attack not only the immediate assault site but the defender’s depth as well.
Not only will defenders
withhold troops and armor from the immediate assault point but the existence,
today, of long range rockets and missiles adds an additional element of defense
in depth. Given the extreme range of
today’s missiles, we must be prepared to extend the assault for hundreds of
miles – no easy task.
The importance of
combat engineers is emphasized.
“Almost one-quarter of the American troops
going in on the morning of D-Day would be engineers. Their tasks, more less in this order, were
to: demolish beach obstacles, blow up mines on the beach, erect signs to guide
incoming landing craft through cleared channels, set up panels to bring in the
troops and equipment (the color of the panel told the ships offshore which supplies
to send in), clear access roads from the beach, blow gaps in the antitank wall,
establish supply dumps, and act as beachmasters (traffic cops).”
Contrast this to
today’s lack of emphasis on engineering tasks and the lack of specialized
equipment for the engineering tasks.
Among other needs, the US desperately needs a modern, specialized Combat
Engineering Vehicle (CEV).
The debilitating
effects of sea-sickness are pointed out.
“Bingham [Maj. Sidney Bingham, CO, 2nd
Battalion, 116th] did an analysis of what went wrong for the first
and second waves. Among other factors,
he said, the men were in the Higgins boats far too long. ‘Seasickness occasioned by the three or four
hours in LCVPs played havoc with an idealism that may have been present. It markedly decreased the combat
effectiveness of the command.”
Consider that time
frame of 3-4 hours rendering troops significantly less combat effective and
then consider the Navy/Marine’s desire to move the assault starting point out
to 25-50 miles with the resultant possible increase in transit times. Yes, an LCAC can travel at high speeds but
LCACs are not doctrinally considered as initial assault transports. At the moment, we only have AAVs. Various ideas have been put forth for dealing
with the extended transit but none have yet been adopted. Transport to the beach is a serious
shortcoming today.
Mobility, on both
sides, is discussed.
“Once in France, the Allied paratroops and
seaborne troops would be relatively immobile.
Until the beachhead had been expanded to allow self-propelled artillery
and trucks to come ashore, movement would be by legs rather than half-tracks or
tires. The Germans, meanwhile, could
move to the sound of the guns by road and rail – and by spring 1944 they would
have fifty infantry and eleven armored divisions in France.”
This is a potentially
profound lesson for today’s proponents of aviation vertical assaults. Once on the ground, the troops have little
mobility and become, in essence, a fixed target. The enemy can move large amounts of troops
(and armor!) to the attack point fairly quickly. An aviation assault, with its utter lack of
armored vehicles must succeed in its mission quickly or risk being overwhelmed
by responding enemy troops. Further,
additional support to interdict enemy troop movements by road or rail is
mandatory, requiring that the aviation assault be much larger in scope than the
mere assault element, itself. How to
provide that additional support at a, presumably, far inland location is a
question not answered by current doctrine.
It was recognized that
the initial assault was not the only or even the biggest challenge. Sustainment of the assault was vital and
problematic.
“So the Allies really had two problems –
getting ashore, and winning the battle of the buildup.”
As we’ve discussed,
sustainment of an assault is the real challenge and is a real shortcoming for
US amphibious forces today. We lack the
numbers and types of transports and connectors to sustain a major amphibious assault.
The logistics of moving
troops from ship to shore was the major impediment to the assault.
“… the chief limiting factor in planning the
invasion was lack of sufficient landing ships and craft. Indeed, that was the single most important
factor in shaping the whole strategy of the war, in the Pacific, in the
Mediterranean, in the Atlantic.
Churchill complained with some bitterness that ‘the destinies of two
great empires … seemed to be tied up in some goddamned things called LSTs.’”
In a similar vein, General
Eisenhower is quoted in the book as crediting the Higgins boat with winning the
war.
“If Higgins (the inventor) had not designed and
built those LCVPs, we never could have landed over an open beach. The whole strategy of the war would have been
different.”
The US has allowed its
fleet of LSTs and other such vessels to nearly vanish. We lack the means to get a sufficient number
of troops and, more importantly, armor and artillery ashore in a useful time
frame to say nothing of the follow on (sustainment) munitions, food, fuel, etc.
We see, then, that the
historical example of D-Day offers many lessons that are still relevant
today. Yes, technology may have altered
a few of the lessons but the alterations are more a matter of degree than
obsolescence.
I’ll offer a few more
posts of this nature based on this book.
D-Day and its lessons are too important to leave in the dustbin of
history.