1st February– 18th April 1942 – Malaya and Burma - Operation Yari – Part I – Japan - Planning the Final Blow
Garrison
Donor
1st February– 18th April 1942 – Malaya and Burma - Operation Yari – Part I – Japan - Planning the Final Blow
An invasion of Burma had been planned by the Japanese for the latter part of December, only to be postponed as the situation in Malaya remained in flux and they had no choice but to call it off completely after the failure to breakthrough at the Swettenham Line and the possible threat of a British counterattack. This was a reasonable decision, and the next logical step would have been to concentrate all available forces on Malaya, focusing on either breaking through the Swettenham Line or mounting a fresh attack from Thailand down the eastern coast, isolating and destroying the defenders at Khota Baru and advancing south capturing other ports and airfields as they went. Initially the Japanese 55th Division, originally earmarked for the attack on Burma, was assigned to strike down the eastern coast, with the expectation of the renewed offensive being launched at the end of January [1].
This straightforward, and eminently reasonable, plan soon fell victim to what came to be called the Japanese ‘victory disease’ After the astonishing success of the Japanese attacks launched on December 7th there was a sense that Japan was unstoppable and fated to win, setbacks in Malaya and at Wake Island notwithstanding. Even among the Allies some seemed to share this sentiment, the shock of defeat now painted the Japanese soldier not as a buck toothed, glasses wearing weaklings, but as fanatical warrior willing, even eager, to die for the emperor and able to march for days without rest through the most appalling conditions sustained by little more than a handful of rice. Montgomery would have a few choice words about such sentiments when he was asked his opinion of the Japanese army, he had a degree of respect for the determination, but was keenly aware that it was married to incredible recklessness both tactically and strategically [2].
The Japanese of course wholeheartedly agreed with this new characterization of their armies as almost superhuman and in the air of exhilaration abroad in Tokyo in January 1942 no one was willing to brook the derailment of the grand plan of conquest owing to one or two minor setbacks. The British in Malaya must be not merely defeated but crushed showing the White colonialists that their time in Asia was done and that they had no choice but to make peace. This view went along with the hollow rhetoric of ‘Asia for the Asians’, where the only Asians worthy of controlling the region were the Japanese. This attitude meant the soon to be corrected setback in Malaya could not be used as an excuse to completely abandon an invasion of Burma for the foreseeable future. A better solution, from the perspective of the leadership in Tokyo, was a simultaneous strike in both Malaya and Burma, overwhelming what had to be thin British defences and taking complete control of the vital resources of the region. In their wildest ambitions Tokyo saw this victory perhaps even opening the door to a future invasion of India itself [3].
What emerged as Operation Yari was bluntly a strategic monstrosity that went unchecked because no one dared to openly argue against anything other than the fine details for fear of attracting the wrath of the senior officers who had embraced it wholeheartedly, and indeed the only major revision that was eventually incorporated served to make it even more unwieldy and complex. In addition to spearheads striking into eastern Malaya and Burma, as well as a renewed attack on the Swettenham Line, a fresh amphibious assault at Kuala Dungun in support of the eastern spearhead was added in the middle of February. The idea was that the once the British committed their forces to engage the spearhead attacking out of Thailand the amphibious force would land behind them. This would theoretically encircle the British forces, allowing for their complete destruction and leaving the Japanese a clear line of advance down the eastern coast. This idea received short shrift from the IJN, who had their own plans for inflicting a decisive defeat on the Allies. This the army would have to mount the amphibious assault with whatever it could scrape together out of its own resources [4].
The ever more complex plan required yet more changes to the Japanese order of battle and those fine details where arguments did take place almost entirely centred around the allocation of troops and equipment to the separate assault formations. The aforementioned 55th Division graphically illustrated the problems caused by these constant revisions. The divisional HQ had been relocated to the east to begin organizing their attack on Malaya under the original straightforward version of the plan. They had barely gotten settled in and started work when orders were issued suspending the movement of the division. Then a further ‘refinement’ meant Lieutenant-General Takeuchi, commanding the 55th, was advised that his division was being divided up, with part of it now providing the infantry for the amphibious assault, only for this to be cancelled as well in favour of using the whole division for the attack on Burma, the very task it had supposed to undertake in December. In one final twist one regiment was belatedly reassigned to the amphibious assault. By the end of February Takeuchi complained in his diary, ‘The British have more idea where my soldiers are than I do’ [5].
Takeuchi would have been shocked to discover just how much truth there was in his bitter joke. The endless discussions over the organization of Operation Yari generated plenty of radio traffic for British signals intelligence to work with and they were able to glean enough to establish the broad outline of the operation, most importantly the plans for Burma and the amphibious assault. This information was supplemented by the fact that within a very short time of occupying Thailand and the area of western Malaya north of the Swettenham Line the Japanese had alienated large parts of the native population. The Japanese could not contain their contempt for the native peoples even when it was in their strategic interest to do and the people of Malaya and Thailand were treated as less than even second-class citizens by the Japanese, subjected to casual brutality practically as a matter of policy by their soldiers and even this paled compared to the ruthless repression carried out by the Kempeitai. Notionally a police force the Kempeitai’s real role was akin to that of the Gestapo, clamping down on anti-Japanese sentiment whether real or imagined and their treatment of POWs was legendarily appalling. The Kempeitai may have been effective at brutalizing peasants and POWs, they were far less effective at preventing information being passed to the British and given the necessity of involving Thai officials and workers in organizing transport and shipping for Operation Yari there was a steady stream of information being received from those who, while not necessarily sympathetic to the British Empire, were eager to see the back of the Japanese at the earliest opportunity [6].
On the other side of the intelligence equation the Japanese proved extremely lax about gathering detailed information on exactly what the British were doing in Malaya and Burma during the spring of 1942. Some cynically suggested that this was because no one wanted to produce any facts that might contradict the expressed opinions of the leaders in Tokyo who were certain that the British in Asia were on their last legs and the Japanese Empire would soon raise its flag over New Delhi as well as Rangoon and Singapore. There seems to have been some truth to this idea, reports that contradicted the optimistic assumptions of Operation Yari were dismissed or simply never sent up the chain of command. Overall though the real issue seems to have been the internal squabbles over the allocation of forces to Burma and Malaya, with no one willing to sacrifice their chance for glory in the name of such mundanities as logistics or concentration of force. This led to different parts of intelligence reports that were submitted being latched on to in support of a particular position, while other parts were dismissed or denied. There was also a level of exaggeration in many quarters, over the capabilities of the Japanese troops and the deficiencies of the British, all of which served to badly muddy the waters as far as the real strategic situation was concerned.
All of this can be summarised as the Japanese needing to be able to win with the forces they could gather by the middle of March when Yari was due to be launched, therefore the unchallengeable assumption was made that British could not possibly have mustered the forces necessary to thwart that goal. This display of victory disease would prove fatal for Japanese ambitions in South East Asia [7].
[1] It was a sensible plan; so it was never going to survive the ambition of the Japanese command in Tokyo.
[2] In some ways this attitude mirrors that adopted by the allies after the Fall of France, overestimating the enemy as way of excusing their own failures.
[3] Overreach is something the Axis nations seemed to be determined to outdo one another at.
[4] The IJN plan will involve the Kido Butai, in an operation, or a pair of operations that will make OTL Midway look sensible.
[5] Essentially a case of too many glasses and not enough bottles to fill them.
[6] Again a common theme with the Axis, either through ideology or short-term necessity they alienated populations who might have supported them.
[7] They are assuming the British will conform to their plans and there are no contingencies if they should deviate from their assigned roles, not dissimilar from what happened with Operation MI in OTL.