Operation Corkscrew -
the Intense Bombing of an Island ~
11th June 1943
Operation Corkscrew, the assault on the small
Italian island of Pantelleria in June 1943, was partly operational and partly
experimental. It would be a useful toe-hold for the planned invasion of Sicily
and Italy and it would serve to test the effectiveness of large scale
bombing on strong, entrenched enemy defensive positions, prior to the landing of troops.
[Map courtesy of Google Map Data 2017.]
Pantelleria is a small
rocky island measuring 8.5 by 5.5 miles. It lies in the channel
between Tunisia and Sicily about 140 miles NW of Malta. Its strategic position
gave it control over shipping movements in the East/Central area of
As early as the latter
half of 1940, Keyes proposed to Churchill that the capture of Pantelleria by amphibious
landing was feasible. It would restore Allied control of the East/Central
Mediterranean, thereby easing the transport of essential supplies to the vital
island fortress of Malta.
use of the
alternative 'safe' route around South Africa's Cape of Good Hope to Port Said
and Alexandria in Egypt would no longer be necessary in most cases. This would reduce
the return trip to just over 6000 miles - a saving of 18,000 miles.
Plans & Preparation
Whilst the Chiefs of
Staff agreed with Keyes that the island could be taken, they were less
optimistic that it could easily be held. Defending the island could, in their
view, exacerbate the problems being experienced in supplying Malta. These
forthright views were also held by Admiral, Sir Andrew Cunningham, who commanded the Mediterranean
[Map of the Port of Pantelleria issued to
Lieutenant Ovenston in June 1943 and reproduced here courtesy of his son Colin Ovenston
of Kansas, USA. Note position of north.]
Despite these strongly held views, Churchill allowed Keyes to take personal command of the
operation. He was authorised to withdraw 2000 of his commandos from the operational control of GHQ.
They underwent training at
Lamlash on the Island of Arran in the estuary of the River Clyde. The commandos
would be transported on the "Glen" ships attached to a fast convoy,
which was shortly to run the gauntlet of the Axis forces in the
Mediterranean. Their final destination would be Malta but the Glen ships
would peel off to seize the island. Once ashore, the two armies would be
so enmeshed that the Italian air-force would be unable to intervene. It
would be an unequal contest between an eager, well trained, volunteer
force and an Italian garrison
taken by surprise.
The convoy was ready to sail on the 18th December 1940,
passing through the Straits of Gibraltar on the 28th. However, at the 11th hour, German dive-bombers were positioned in Sicily, which initially
postponed the operation before it was abandoned altogether. Keyes was furious. His already acrimonious relations with the Chiefs of Staff, the First Lord, Admiral
Cunningham and everyone he considered had given craven advice, erupted in the
form of numerous memos to Churchill; but all to no avail. In the event,
the convoy minus the Glen ships, had a tough passage through the Mediterranean.
The aircraft carrier, Illustrious, was damaged by 6 heavy
bombs and 3 near misses. With the benefit of hindsight, the diversion to Pantelleria was unlikely to have taken place in these
In the spring
of 1943, the focus once more turned on Pantelleria, as plans for the invasion of
Sicily and mainland Italy were prepared. The main objectives were to gain a toe hold on Italian soil prior to the invasion of Sicily and
to assess the effectiveness of intensive bombing of enemy defensive positions
in advance of the landing of troops. By then, intelligence sources indicated that the
garrison on the island was 12,000 strong in well-entrenched pillboxes and 21 gun
batteries of various calibres. Professor, Sir Solly
Zuckerman, prepared a 238 page scientific assessment of the impact of an
intensive bombing raid. It concluded that a 30% reduction in
enemy material resources would greatly weaken resistance.
In June of 1943, 14,203 bombs, amounting to 4,119 tons, were dropped on 16 batteries.
Out of 80 gun emplacements bombed, 43 were damaged, 10 beyond repair. All
command and control communications were destroyed, together with ammunition
stores, air-raid shelters and all the elements of a WW2 artillery system. About an hour before the landing craft reached the beaches,
opened fire. When the first of the Commandos landed after the bombardment, the
white flag was already flying. Churchill later recorded in his memoirs, that the only
casualty was a man bitten by a mule!
[Photo; Bombs by the ton bursting on the docks and harbour
before the landing craft went in. (© IWM (A 17667).]
Zuckerman's analysis on the impact of the bombing and his recommendations as to the conduct of the bombing, proved to be amazingly accurate. It was not necessary to disable all or most of the guns. The human factor was likely to be the weakest link. In
the event, the Axis defences were 47% effective at the time their forces surrendered - enough to have inflicted great damage on the invading
There was, however, an unfortunate consequence of the bombing of Pantelleria.
There was a developing belief that the dropping of a large
number of bombs on enemy strong points, in advance of troop movements would ".. make land movements a
of flitting from one dazed body of enemy troops to another." Air Chief Marshall Tedder, Royal Air Force,
took the contrary view when he
wrote in a memo, "Pantelleria is becoming a perfect curse."
Nonetheless, it was a very successful operation, achieving much at minimal cost.
[Photo; Landing craft awaiting the signal to close and
enter the harbour. The last of the landing craft entering the harbour. Picture
at 2pm when all resistance had ceased. © IWM (A 17671).]
There are around 300 books listed on
our 'Combined Operations Books' page. They, or any
other books you know about, can be purchased on-line from the
Advanced Book Exchange (ABE). Their search banner link, on our 'Books' page, checks the shelves of
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The Watery Maze by Bernard Fergusson. Published 1961 by Collins.
Commandos and Rangers of World War 2 by James D. Ladd. Pub
1978 by MacDonald & Jane's. 0 356 08432 9
Commandos 1940 - 1946 by Charles
Messenger. Pub by William Kimber, London 1985. 0 7183 0553 1