Winning the Burma Air Battle and Breaking the Ground Siege at Imphal

By MSW Add a Comment 36 Min Read
Winning the Burma Air Battle and Breaking the Ground Siege

Art by Romain Hugault

Protracted air campaign in support of ground operations
during World War II. At the outbreak of war, Allied air defenses in Burma
consisted of a single squadron of Brewster Buffaloes and the Curtiss P-40s of
the American Volunteer Group (the famed Flying Tigers). They faced large
numbers of Japanese aircraft based in Thailand and Indonesia. The air campaign
opened in late December with Japanese attacks on the city of Rangoon that
caused almost 30,000 civilian casualties.

In mid-January 1942, Japanese ground forces advanced into
Burma supported by the Third Army Air Division. Although outnumbered, the
Allied air forces in general fought well, but Japanese attacks on bases took
their toll, and by late spring the campaign was over with the Japanese in
possession of most of Burma. This cut the Burma Road, the only viable overland
communication route to China, forcing supplies for China to be transported by
air over the “Hump” of the Himalayas.

The Allies launched several offensive operations in late
1942 and 1943 with only limited success. Of particular interest was the
operation of jungle-trained Chindit forces under Brigadier General Orde
Wingate, who penetrated deep behind Japanese lines and were supplied entirely
by air for extended periods. Operations by the British XV Corps in the Second
Arakan Offensive in January 1944 were also supplied by air.

In early 1944, the Japanese Fifteenth Army attacked from
western Burma into India but was stopped by British and Indian troops at Imphal
and Kohima. Both defensive positions were surrounded for long periods of time,
again supplied by the large number of Allied transport aircraft in the area
until eventually relieved by forces advancing from India. Chindit operations
continued, including the construction and operation of the Broadway air base
behind Japanese lines. Broadway overstepped Allied capabilities, however, and
Japanese air attack destroyed the aircraft based there.

By July 1944, Allied air strength had increased to 64 RAF
and 26 U. S. squadrons, and a major Allied offensive was imminent. The most
prevalent Allied aircraft were Hurricanes, but Spitfire, Beaufighter, P-40, and
P-47 types contributed significantly, along with a variety of bomber aircraft.
Unlike many of the well-known air battles in the Central and Southwest Pacific,
Japanese air units were army units flying such aircraft as the Kawasaki Ki 43
and Ki 44.

The Japanese effectiveness had been spent in the Imphal and
Kohima battles; the Allied advance, primarily by British, Indian, and Chinese
forces, was hard-fought but steady, interrupted only by the monsoon season. It
was supported by overwhelming airpower. Rangoon finally fell on 2 May 1945, and
the campaign in Burma came to a close. Planned Allied operations in the theater
against Malaya and Singapore had not begun when the war ended.

The battles for Kohima and Imphal were emphasizing that the
Allies’ strategy was critically dependent upon air power to enable the supply
of ground forces by air drops, or by aircraft landing on airstrips close to the
front lines. During the battle of the Admin Box in the Arakan, 6.5 million
pounds of supplies had been carried in by air to sustain the defenders.
Simultaneously, in northern Burma, General Stilwell’s US and Chinese forces received
10 million pounds of supplies by air.

Demand for supplies by air was continuous and increasing
from many areas, including the now consolidated Allied positions along the
Arakan coast, the West Africans in the Kaladan Valley, the Chindits and other
LRPG operations deep in Japanese territory and the US/Chinese forces. To meet
these competing demands, General Old’s Troop Carrier Command, four RAF and four
US squadrons, supplemented by Commando transport aircraft from the Hump route,
were already operating at maximum capacity. On top of this situation came the
Imphal crisis, termed in typical understatement by the RAF as the ‘the Flap at
Imphal’.

During the second half of April and throughout May, Allied
troops gradually pushed the Japanese back from their threatening positions
around Kohima and Imphal. The capture of the enemy strongpoint of Aradura Spur,
3 miles south of Kohima, on 5/6 June was symbolic of the change. Around that
time IV Corps from Imphal and XXXIII Corps from Kohima began moving out to attempt
to join up and secure the Imphal to Kohima road.

The monsoon weather was worsening each day, and Japanese
ground forces, now suffering from a severe shortage of supplies, were pulling
back bit by bit under Allied pressure. At times neither fact seemed to make any
difference to the JAAF as if they still thought that their efforts could stem
the tide. On 17 June Spitfires from Nos 81, 607 and 615 Squadrons combined to
intercept another large formation of Oscars from the 50th and 204th Sentais.
Flying Officer Kevin Gannon and Flight Sergeant Bert Chatfield achieved their
third victories, as the three Spitfire squadrons between them claimed six
Oscars destroyed.

One of the pilots of those three enemy aircraft shot down
was Sergeant Major Tomesaku Igarashi of the 50th Sentai, who was a
sixteen-victory ace. In the days and weeks that followed, it was realized that
this was the last major fighter sweep of the JAAF until the monsoon had passed.
Was the destruction of six Oscars the last straw? Or was it the loss of their
redoubtable fighter ace, Igarashi?

Within a few days it was the Allies’ turn to lose one of
their finest Spitfire aces, New Zealander Mervin Robin Bruce Ingram, squadron
leader of No. 152 Squadron. In August 1940 Bruce Ingram was just nineteen, a
clerk in Dunedin, New Zealand, when he joined the RNZAF. After his preliminary
flying training on Tiger Moths and Fairey Gordons, he was posted as a sergeant
to the UK, where he attended 55 OTU at Heston until June 1941. Postings
followed to Nos 66, 611 and 436 Squadrons RAF. Ingram was commissioned in
November 1941 and, in April 1942, was posted with No. 436 Squadron RAF to
Malta, where he claimed three victories.

After that he claimed more victories in North Africa and was
awarded the DFC. Ingram was promoted to squadron leader of No. 152 Squadron
RAF, with whom he made more claims in operations over Italy. In November 1943
he led No. 152 Squadron to India and subsequently into operations in the air
battles over Imphal. At the end of May 1944, so as to be able to do long-range
escort operations with extra fuel tanks fitted to each Spitfire’s belly, No.
152 Squadron had moved from Comilla to Palel, close to Imphal.

On 21 June Squadron Leader Ingram led No. 152 Squadron on an
escort operation to the Lake Indawgyi area. On his return to Palel he crash
landed, suffering severe facial injuries. While being treated at Imphal’s field
hospital, a tetanus infection and malaria caused his condition to become
critical. Like so many long-serving fighter pilots, his general state of
physical exhaustion did not help. Tragically on 11 July he died – the
randomness of fate, and unforeseeable consequences had struck again. By the
time of his death Bruce Ingram had accumulated the remarkable score of fourteen
victories (including six shared), three probables and five damaged.

On 22 June when the leading troops of the British 2nd and
Indian 5th Divisions made contact with each other, from opposite directions on
the road between Kohima and Imphal, the siege was over. The Japanese Army had
been beaten back, and lost 53,000 men in the failed offensive, compared to the
Allies 17,000. Unable to be re-supplied through the mountainous jungle, hungry
and losing even more men with malaria and other diseases, it had no choice but
to retreat. As in the Battle of the Admin Box, on the ground and in the air the
Allies had made a stand as never before against the Japanese.

The siege of Imphal lasted eighty days. During this time
only two Dakotas and one Wellington aircraft on the supplies shuttle service
were shot down by Japanese fighters. The Japanese strategy of making lightning
fast attacks, unburdened by supplies for more than a week or two, had been
their undoing when Allied defences did not buckle. The Allies’ decisive
advantage had been air power: transport aircraft to re-supply by air every day
the besieged garrisons at Kohima and Imphal; Spitfire fighter squadrons to
protect the air transport routes, and blunt the bombing and strafing raids by
the JAAF; and fighter-bomber operations against Japanese infantry positions.

In the skies above Kohima and Imphal, and over Arakan and
Manipur provinces, Allied air forces gained a discernible edge over the JAAF.
In some views it was a degree of air superiority. Behind the skills and
fortitude of the pilots and air crew there were critical contributing factors
such as training, greater numbers of more modern aircraft, improved radar
early-warning systems, the building and maintenance of airfields and the
bedrock foundation of aircraft groundcrew and other support staff to keep the
planes serviceable.

Yet at the sharp end, where everything came to the acid
test, in the dogfights and air battles with the JAAF, one man’s contribution
stood out as pivotal. At his Air Fighting Training Unit (AFTU) at Amarda Road
near Calcutta, Group Captain Frank ‘Chota’ Carey instilled in every pilot
attending the lessons he had learned in chalking up twenty-eight victories.
That wealth of experience had been gained in countless dogfights over France,
in the Battle of Britain and in the stubborn fighting withdrawal in the face of
the Japanese onslaught on Rangoon and Burma in 1942.

Carey’s unique leadership and communication skills enabled
him to gain the collaboration of other fighter aces as instructors, such as
Flight Lieutenant J.H. ‘Ginger’ Lacey and Australian Flying Officer Jack
Storey. In the lessons on gunnery and fighter tactics one technique stood out,
the rolling attack. At the time the advice in an RAF guidelines paper on
tactics described the rolling attack as follows:

The attacking aircraft
passes over the target from the beam position approximately 1,500 feet above.
As the target disappears under the wing, the attacking aircraft swings the nose
back in the opposite direction to that of the target, and goes over into a
barrel roll, which is controlled so as to bring the guns to bear as soon as the
manoeuvre is completed.

Carey summed it up simply as giving you a good view of your
target, and easier to assess the line of flight, together with keeping one’s
eyes solely on the gunsight, and flying by the seat of one’s pants. In the
constant struggle to counter the more manoeuvrable and nimble Japanese
fighters, the rolling attack was a potent tactic.

In July 1944 the Allies’ breaking of the sieges of Kohima
and Imphal, together with the operations in the north by the Chindits and
Stilwell’s American/Chinese forces, were forcing the Japanese to pull back
southwards. Yet in London the Chiefs of Staff, heavily influenced by
Washington’s strategic priorities, issued a directive for Burma which focused
predominantly on support for China. It spoke of the need to develop and secure
air and overland communications with China to maximize supply of fuel and other
stores to Chiang’s forces, so as to support American operations and strategy
against Japan in the Pacific.

No mention was made of driving south towards Rangoon and
reconquering Burma. At that time both British and American Chiefs of Staff gave
the impression that they had little or no understanding of the extent and scale
of the defeat of the Japanese at Kohima and Imphal. In particular, there was no
realization of the significance and consequences arising from the Allied
victory in the air over the JAAF.

Despite the onset of the monsoon, the orders for air
operations to be maintained remained in force. With an ascendancy gained over
the JAAF in northern Burma, RAF fighter squadrons began to increase offensive
operations, putting in more bombing and strafing sorties in a fighter-bomber
role in support of ground forces. Strafing operations known as Rhubarbs, which
in effect were fighter patrols in search of targets of opportunity, were
becoming more and more prevalent. Although combat encounters with the JAAF grew
fewer, through dive-bombing and low-level ground attack losses of Allied
aircraft from enemy anti-aircraft fire, and often small arms, increased.

In July 1944, with the monsoon at its worst, No. 273
Squadron RAF, transferring from China Bay, Ceylon, to take on these kind of
operations, arrived at Chittagong. Flight Lieutenant Gerry Smith and Flying
Officer ‘Pip’ Piper found that their quarters, little more than bamboo basha
shacks, were surrounded by water in every way.

Mosquitoes plagued us
and we spent every evening drinking under the comparative security of our
net-curtained charpoys. Everything ran with water. The runways were awash, the
aircraft seats sodden, and we dreaded to think how much seeped into our
parachutes. We flew on patrols and had the odd scramble but what we were waiting
for was our first operation.

Rostered onto that first mission by No. 273 Squadron was
Canadian Flying Officer Francis ‘Aggie’ Agnes (RCAF), flying as No. 2 to Flying
Officer John Vidal.

It was a retaliatory
strike against a small village east-south-east of Chittagong. Intelligence
reports had filtered in, claiming cruel treatment to a downed pilot. Our guns
were loaded with incendiary ammo, and we spent about fifteen minutes working
over the bamboo huts setting everything we could on fire. I personally felt
very miserable at what we did, but was told, ‘Aggie that’s war!’

After the relatively
soft life in a defensive role which they had enjoyed in Ceylon, waiting for
Japanese air raids and an invasion of the island, which never came, Flying
Officer Piper’s reaction to the much harsher frontline conditions typified the
feelings of the rest of the squadron.

We began the routine
of one flight of aircraft always being on Immediate Readiness, which is One
Minute Call. We had to wear the Mae West life vests, boots, and usual escape
kit in a bag around our waists. In those trying monsoon conditions, this attire
soon began to have its effect on our bodies. Prickly heat became endemic,
erupting in the most awkward and intimate parts, which made life miserable. The
heavy flying helmets and oxygen masks brought us out in weeping blisters, which
never seemed to heal.

The basis of our daily
diet was eggs, bully beef and soya links, and the latter, although very
nutritious, tended to be rather tasteless, whichever way they were cooked.
Conditions apart, we soon started to get the hang of shooting up camps, boats
and concentrations of Japanese troops, if we could find them. Our maps were out
of date, so we were not always as accurate as we would have wished.

After a few months at
Chittagong, about 45 per cent of the ground crew went down with malaria, but
very few aircrew were similarly afflicted. We put this down to the daily intake
of the Indian alcohol, which on our higher pay we could purchase, whereas the
ground crew, being limited to beer, were not so well equipped. However
salvation was on the way, and when everyone was ordered to take a daily dose of
two Mepacrin tablets, malaria became virtually a thing of the past. Not so with
amoebic dysentery and all its rotten associations.

I can remember nothing
to recommend Chittagong. We did visit the Club in town, and if I remember
correctly, alcohol was on a ticket system with everyone having a book of
tickets, for whiskey, gin and brandy. We tried to work this out in a pool
system amongst ourselves, to prevent mind-bending mixtures and consequent
hangovers! After a few months we were moved to Cox’s Bazar, which was this side
of the border inside India. The runway, which was near the sea, was good, and
we enjoyed the breeze off the water. The bashas were better, and the mosquitoes
out of season, as we cheerfully got down to setting up our new home.

With clear sunny days
free of humidity, our flying started to increase. Our role with our Spitfires
was basically Air Defence, and then ground attacks as a secondary role. We
still had six aircraft on Instant Readiness, which took its toll with only
eighteen pilots. We were working one hour before dawn to dusk every day. It
could be said that being on Readiness did not constitute work, but try waiting
by your aircraft with all your kit on, hour after hour – nothing could be more
frustrating and boring.

On 3 August the Allies’ base at Myitkyina, which was under
siege by enemy forces in the northern Irrawaddy valley close to the border with
China, was at last relieved. Myitkyina was critically important, since from
there the Irrawaddy river and its valley floor stretched south to Mandalay,
Magwe and the capital Rangoon.16 The Japanese may have been on the back foot,
both on the ground and in the air, but another ruthless enemy, the monsoon, was
always ready to take its toll.

Mountbatten’s adoption of a strategy for the air force to
fly through the monsoon of 1944, despite advice received, could not have been
made with a personal knowledge of the difficulties and risks involved.
Certainly it was made before Mountbatten himself had experienced a Burmese
monsoon. Those pilots who had experienced some of the monsoon weather of 1942
and 1943 knew differently, and that the worst of the monsoon conditions would
inevitably ground aircraft.

On 10 August 1944 Canadian Flight Lieutenant ‘Waddy’ McGarrigle
was a pilot of one of sixteen Spitfire VIIIs of No. 615 Squadron RAF who were
rostered to fly from Palel to Calcutta. It was a transfer to give them a
deserved rest from combat operations. McGarrigle found that the pre-flight
briefing told them little, other than providing maps for the route.

I had never before
seen that part of the country, and there were not enough maps to go around. We
were flying as a squadron with all the aircraft we had. The flight was taking
us away from any enemy action, so we did not expect any problems. From the
Imphal valley we flew in a westerly direction through the mountains heading for
the plains of Bengal. When we got clear of the mountains there was an enormous
cumulo nimbus cloud in front of us. I began to think about the map I had seen,
and guess where to go for an alternate landing field if needed.

To my surprise the CO
started to climb the squadron, staying on course directly towards this gigantic
and scary-looking storm. I kept my section in its place in the formation,
thinking that the CO was just fooling around, and would change course at the
last minute. When it became doubtful that this was going to happen, I had a
plan of my own. If the CO was going to climb into a storm like that, he could
do it without me!

The moment we hit
cloud, I throttled back to a fast idle, and began a rate one turn to starboard.
In the worst turbulence I have ever experienced, I had a great deal of trouble
just getting turned around.18

McGarrigle flew on
blind, hoping that by reversing his direction he would emerge from the cloud
and assumed the pilots in his section would follow his lead. Eventually he
indeed came to a small clearing in the cloud.

Then a voice shouted
in my R/T, ‘There’s land down there!’ It scared the hell out of me. It was my
No. 2. I had not imagined that anyone had stayed that close. I went down
through the break in the clouds, and came out over country as flat as a table
top, and completely flooded. Thinking about the map which I had looked at, I
could remember seeing alternate airfields to the north of our proposed route.
But I was not sure if there were any mountains in that direction.

After deciding to fly
towards Calcutta, I estimated the course and flew at a height of about 200 feet
through torrential rain. Over a seemingly endless expanse of flooded fields,
dotted here and there were houses and clumps of trees. The fuel gauge and the
clock were not working, so this part of the trip seemed to last forever. Every
few minutes I would call on the R/T until at last a controller answered, and
directed the two of us to Baigachi.

On landing at
Baigachi, I discovered that there was no paint left on any of the aircraft’s
leading edges. The whole plane looked like it had been sand-blasted! We had
been in the air for 2 hours and 15 minutes – seemed much longer. When I
questioned my No. 2 on how he had stayed so close to me in the cloud, he said
that he had been motivated by fear. He was afraid he would be done for if he
lost me.

The rest of No. 615 Squadron fared less well than McGarrigle
in the storm clouds. Squadron Leader Dave McCormack and three other pilots, two
Australians and one Canadian, were killed, while four more were injured in
forced landings – a total of eight Spitfire aircraft lost.

On 2 October at Cox’s Bazar rostered pilots of No. 273
Squadron were on their immediate readiness status. That first victory claim
over a Japanese aircraft still eluded them. Flight Lieutenant Charles Laughton
was flight commander of A Flight on readiness for any scramble order. He and
his No. 2, Flying Officer Bruce, waited in the palm hut beside the beach strip
with their Spitfire VIIIs lined up outside.

I was expecting
nothing, as up to now nothing had really ever happened on these alerts. Since
we arrived there on 26 August from Chittagong, we had just done patrols,
‘rhubarbs’, and army support ops. We were on our own except for No. 2 Squadron
IAF with their Hurricanes. A Dakota flew in each week with our rations,
including a bottle of beer each.

Without any warning
the Scramble order came over the remote field telephone in the corner of the
basha – a thing we viewed with some mistrust with no idea who was on the other
end. Anyhow, Bruce and I got off as fast as we could, and I made contact with
the Controller. ‘Vector 170 and then 180 due south over the sea at some 10,000
feet.’ This was heading towards Japanese held Akyab, where the enemy had a
forward airfield. Suddenly we saw it – a Dinah flying straight and level away
in front of us.

Laughton had recently returned from a Gunnery School course
at Wing Commander Frank Carey’s AFTU at Amarda Road in Calcutta.

Remembering those
‘cine-camera’ tactics from Frank Carey, I told Bruce to take high cover, while
I positioned myself for a machine-gun only, high-quarter attack. Although
classically executed, I must have missed. I called Bruce down and I went up to
take his place as high cover. The Dinah was flying very fast, and Bruce seemed
to make no impression either. But it must have seen him, as it began to dive
towards the sea.

We were both at Full
Boost and continued to attack one at a time. Some smoke from the Dinah became
discernible, but we were wary of what appeared to be an upper gunner covering
our approach. It was now banking so low over the sea and so tight, that it looked
as though a wing tip was scraping the waves. Our fuel was low and we were over
the sea far from base. Both excited and frustrated we were not worrying about
the gunner firing at us. I turned my guns onto cannon, which had only a second
or two of shells loaded, and sat in dead behind the Dinah in a steep low turn.
To hell with Amarda Road Gunnery School – ‘Let it rip!’ I thought.

Laughton closed in on the Dinah and gave it a full blast of
all his cannon ammunition.

It seemed to explode
in front of me as I then flew through the debris, before pulling up in sheer
panic of being hit by it all. We circled for a moment over the smoking wreckage
in the sea, throttled back to normal, then the more economical revs, contacted
control, and asked for a course back to base. The whole squadron was there when
we got back, the CO, Squadron Leader Peter Mayes, standing by his jeep, the
‘Spy’ (Intelligence Officer) . . . and everyone. It was hard to believe . . .
it was the squadron’s first kill in the India-Burma theatre.

Flight Lieutenant Gerry Smith was acting CO at the time of
the scramble order, since Squadron Leader Peter Mayes was rostered off duty,
and was said to be catching up on some sleep.

Squadron Leader Mayes was very unhappy with me for not alerting him at the time of the Scramble. But there were so many alerts and Scrambles which turned out to be false alarms. At least I informed him once we learned of the destruction of the Dinah, and he was there when Laughton touched down. There were great celebrations in the squadron that night.

During October the British Fourteenth Army crossed the
Chindwin river in strength, preparing for an offensive down the Shwebo Plain.
To provide air protection and support, engineers cut an airstrip out of the
jungle at Tamu in the Kabaw valley. On 29 October it had enabled No. 152
Squadron’s Spitfire VIIIs to fly into Tamu, the first RAF squadron to return to
a base in Burma since the disastrous retreat of early 1942. By early November
1944 Allied ground forces were advancing farther south into Burma, which meant
that Spitfire squadrons based in India were out of range. In the second half of
December the squadrons of No. 221 Group RAF were assigned to support Fourteenth
Army in its drive southwards into central Burma, and to move forward to
temporary airstrips, as they became available behind the front lines.

When the JAAF was able to mount an attack in force they
could still pose a formidable threat. In the early morning of 11 December, more
than sixteen Oscars were detected coming north from Akyab. Twelve Spitfires of
No. 273 Squadron were scrambled, and with a height advantage dived onto the
enemy aircraft, which turned east at 9,000 feet. It soon became a free-for-all,
aircraft mixing it all over the sky. The Japanese flyers gradually eased away
to the south east, and with excellent manoeuvrability avoided combat. Some
strikes were made, but no claims. However Warrant Officer ‘Junior’ Bullion
(RCAF) was lost, his aircraft seen burning on the ground about 30 miles east of
Akyab. Another aircraft was lost, when Flight Sergeant Baukroger ran out of
fuel, and made a forced landing on the beach.

Warrant Officer Reg Ashmead joined 273 Squadron in early
December, but as the ‘new boy’ pilot on 11 December 1944 was left out of the
Scramble.

The loss of two pilots meant it was a bit glum in the Mess
that night. On 20 December we provided the escort for Lord Mountbatten, who was
on an inspection tour of the area. On the last day of the year we moved south
to a strip called Maughnama, which was a dirt strip half way between Cox’s
Bazaar and Akyab Island. Conditions were pretty primitive. We just had our
aircraft, our tents and our camp beds. The cooking was done in the open, and we
bought eggs and chickens from the locals.

That move south by No. 273 Squadron to Maughnama, halfway to
Akyab Island, was for a reason. Another push down the Mayu peninsula was under
way, to complement Fourteenth Army’s offensive towards Mandalay, and so as to
mount another attempt to capture Akyab Island. Air support, air supply by
Dakotas, and overall air superiority protection continued to be critical
dependencies.

By MSW
Forschungsmitarbeiter Mitch Williamson is a technical writer with an interest in military and naval affairs. He has published articles in Cross & Cockade International and Wartime magazines. He was research associate for the Bio-history Cross in the Sky, a book about Charles ‘Moth’ Eaton’s career, in collaboration with the flier’s son, Dr Charles S. Eaton. He also assisted in picture research for John Burton’s Fortnight of Infamy. Mitch is now publishing on the WWW various specialist websites combined with custom website design work. He enjoys working and supporting his local C3 Church. “Curate and Compile“
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