parsifal
Colonel
removing the US from the equation is bound to have a massive effect on the outcome. However the indications from the wartime records are that the US intended to go war at any rate by March of 1942. The intentions of the US administration was to force the issue of the open door policy once the strategic bomber threat was in place in the philipinnes, and the Filipino army was sufficiently trained to defend the Philipinnes. That this whole strategy of the US administration at this time was wildly optimistic (the effects of the 100 B-17s planned for the Far East grossly over-estimated, and the abilities of the filipino army also overrated greatly) are irrelevant....the US was determined not to allow the Japanese exclusive rights in China, and that was that. Moreover by 1941, the US attitude towards Japoanese agression had hardened so much that they would not have even stood to allow for the continued occupation of Manchuria. Rossevelts policy against the Japanese had become so entrenched that he wanted "Open Door" policy to apply to the whole of China, including Manchuria.
In Europe, the US was also taking an increasingly impatient attitude towards Germany, such that effectively, a state of war existed between the two countries from about September '41 onward. Bottom line is this, the US was most unlikely to stand idly by for much longer than they did , except under the circumstances of a massive , fundamental change in foreign policy of both Axis camps. I just cannot see that happening, because for the Axis to comply with the US wishes, they would have to change their own fundamental makeup, in other words they would have to abandon their exapansionary and agressive policies almost in their entirety, and submit to free trade principals, the rights of self determination, and adopt essentially democratic domestic policies I just cannot see that happening
Under the most ideal of circumstances, the entry of the US may have been delayed by six months at most. In the case of the Japanese, that would, at minimum have required a pullout out of french IndoChina, and at least a truce in China, if they had tried to withdraw from mainland China, however, there would have been a civil war within Japan itself, and a rapid succession of political assassinations. The only scenariio that can make any sense in all of this is if we assumne a continued temporary presence in China by the Japanese, but a pull out from South east Asia, and a genuine drive for peace (but paradoxically no military pull out). Where does that leave us?
Well, for a start it means that the Japanese dont have access to the fifty divisions that constitute their army....instead they have access to about 6-8. They did not have a single armoured division operational in 1941, although they did have a number of armoured regiments. The Japanese air forces, between them could spare approximately 600 aircraft, with a further 300 on garrison in Machuria. The main shortages to be faced by the Japanese, however, would have been in the area of Motor transport. The Japanese had 16 independant motor transport groups (they call them companies, but I dont think they are companies in the western miltary sense) in the whole army in 1941, and 12 of them were fully occupied in China, providing logistic support to the expeditionary force. They were in the process of of forming another 2 independant "companies", so overall, they may have had access to 6 or so independant truck formations. The 12 "companies" in China were able to hold a static line for 31 divisions, but an army on the defensive, or not moving, is consuming roughly 1/3 the amount of supply that an army that is advancing or in comabt will consume. So in a defensive situation, where sea transport cannot be used, the 8 companies that might be available might be able to support up to 20 Divs in a static or defensive role, but in an offensive or attacking posture could only support about 6 divs. Moreover this rough formula is only valid for advances not exceeding 200 miles, for distances greater than that, you needed to double and triple your logistic support for each unit.
So this means that the Japanese could support about 6 divs on offensive operations to a depth of 200 miles, and about 3 divs to a depth of advance of about 500 miles. In western terms that amounts to about two corps initially and one coprs after that. .For the record, the Germans attacked the 3 million Russian in the west with no less than 36 Corps (not includiung the minior axis satellites) including 5 Corps of fully formed Panzers. They were supported by more than 200000 trucks, as compared to the 30000 that would be available to the Japanese. The Japanese would be faced by 500000 Soviet tropps (over 200000 of them the highly trained Siberians), so whereas the Germans have an odds ratio of about 1:1, with the advantages of surprise and tanks to support them, the Japanese will have odds of about 1:5 against them, and no tank supoport.
In the air, the Soviet far eastern airfleet amounted to approximately 3000 aircraft in June 1941, and this number actually increased throughout the Summer of 1941. The far eastern air reserves were not raided by the Soviet high command until December 1941, so here we have 3000 Soviet aircraft pitted against 1100 Japanese aircraft, of which no more than 140 will be zeroes, and no more that 40 will be Ki-43s. The remainder will be, mostly Ki-27s, and A5Ms, mostly, against an assortment of Soviet aircraft, ranging from I-15s through to Yak-1s. I believe the Japanese would do quite well in the air, as compared to what would happen to them on the ground, but they would nevertheless have been heavily outnumbered and with a much smaller capability to replace losses. Conversely Soviet pilot training was pretty attrocious in 1941, and their force organization even worse.
Returning briefly to the west, a retreating Japanese army in Asia would have freed up or allowed the equipment of (courtesy of enhanced Lend Lease) about 40 extra Allied Divisions, 11 Australian (including 3 already in the middle east but recalled in 1941, because of the threat of Japanese invasion), one New Zealand (retained in the Pacific for the same reason) and 32 Indian Divs (include about 6 in the middle east but held back because of equipment shortages). In addition, there are the equivalent of two British Divs no longer transferred from the Middle East to the far East, and the Prince Of Wales/Repulse, the Indomitabl;e, the three Illustriou class, a swag of cruisers, and 3 or four older battleships are no longer needed for service in the far east....wonder where they are going to go????
For the moment, lets be conservative, and assume that the Middleastern command is reinforced by no less than 12 extra Divs, and a gaggle of ships. This does not bode well for Rommel, and rather than undermanning the agheila line in December, the allies after the fall of Bengahzi continue their advance, capturing Tripoli by the end of November 1941. The threats to germany's southern front now are very serious, with the collapse of italy imminent. I estimate the Germans will be forced to withdraw at least 6-8 divs to counter this problem, along with at least 500 aircraft. Straight away there goes your reserves for Typhoon, so the net overall effect on the chances of Axis success have actually decreased by Japan not attacking in the Far East.
In Europe, the US was also taking an increasingly impatient attitude towards Germany, such that effectively, a state of war existed between the two countries from about September '41 onward. Bottom line is this, the US was most unlikely to stand idly by for much longer than they did , except under the circumstances of a massive , fundamental change in foreign policy of both Axis camps. I just cannot see that happening, because for the Axis to comply with the US wishes, they would have to change their own fundamental makeup, in other words they would have to abandon their exapansionary and agressive policies almost in their entirety, and submit to free trade principals, the rights of self determination, and adopt essentially democratic domestic policies I just cannot see that happening
Under the most ideal of circumstances, the entry of the US may have been delayed by six months at most. In the case of the Japanese, that would, at minimum have required a pullout out of french IndoChina, and at least a truce in China, if they had tried to withdraw from mainland China, however, there would have been a civil war within Japan itself, and a rapid succession of political assassinations. The only scenariio that can make any sense in all of this is if we assumne a continued temporary presence in China by the Japanese, but a pull out from South east Asia, and a genuine drive for peace (but paradoxically no military pull out). Where does that leave us?
Well, for a start it means that the Japanese dont have access to the fifty divisions that constitute their army....instead they have access to about 6-8. They did not have a single armoured division operational in 1941, although they did have a number of armoured regiments. The Japanese air forces, between them could spare approximately 600 aircraft, with a further 300 on garrison in Machuria. The main shortages to be faced by the Japanese, however, would have been in the area of Motor transport. The Japanese had 16 independant motor transport groups (they call them companies, but I dont think they are companies in the western miltary sense) in the whole army in 1941, and 12 of them were fully occupied in China, providing logistic support to the expeditionary force. They were in the process of of forming another 2 independant "companies", so overall, they may have had access to 6 or so independant truck formations. The 12 "companies" in China were able to hold a static line for 31 divisions, but an army on the defensive, or not moving, is consuming roughly 1/3 the amount of supply that an army that is advancing or in comabt will consume. So in a defensive situation, where sea transport cannot be used, the 8 companies that might be available might be able to support up to 20 Divs in a static or defensive role, but in an offensive or attacking posture could only support about 6 divs. Moreover this rough formula is only valid for advances not exceeding 200 miles, for distances greater than that, you needed to double and triple your logistic support for each unit.
So this means that the Japanese could support about 6 divs on offensive operations to a depth of 200 miles, and about 3 divs to a depth of advance of about 500 miles. In western terms that amounts to about two corps initially and one coprs after that. .For the record, the Germans attacked the 3 million Russian in the west with no less than 36 Corps (not includiung the minior axis satellites) including 5 Corps of fully formed Panzers. They were supported by more than 200000 trucks, as compared to the 30000 that would be available to the Japanese. The Japanese would be faced by 500000 Soviet tropps (over 200000 of them the highly trained Siberians), so whereas the Germans have an odds ratio of about 1:1, with the advantages of surprise and tanks to support them, the Japanese will have odds of about 1:5 against them, and no tank supoport.
In the air, the Soviet far eastern airfleet amounted to approximately 3000 aircraft in June 1941, and this number actually increased throughout the Summer of 1941. The far eastern air reserves were not raided by the Soviet high command until December 1941, so here we have 3000 Soviet aircraft pitted against 1100 Japanese aircraft, of which no more than 140 will be zeroes, and no more that 40 will be Ki-43s. The remainder will be, mostly Ki-27s, and A5Ms, mostly, against an assortment of Soviet aircraft, ranging from I-15s through to Yak-1s. I believe the Japanese would do quite well in the air, as compared to what would happen to them on the ground, but they would nevertheless have been heavily outnumbered and with a much smaller capability to replace losses. Conversely Soviet pilot training was pretty attrocious in 1941, and their force organization even worse.
Returning briefly to the west, a retreating Japanese army in Asia would have freed up or allowed the equipment of (courtesy of enhanced Lend Lease) about 40 extra Allied Divisions, 11 Australian (including 3 already in the middle east but recalled in 1941, because of the threat of Japanese invasion), one New Zealand (retained in the Pacific for the same reason) and 32 Indian Divs (include about 6 in the middle east but held back because of equipment shortages). In addition, there are the equivalent of two British Divs no longer transferred from the Middle East to the far East, and the Prince Of Wales/Repulse, the Indomitabl;e, the three Illustriou class, a swag of cruisers, and 3 or four older battleships are no longer needed for service in the far east....wonder where they are going to go????
For the moment, lets be conservative, and assume that the Middleastern command is reinforced by no less than 12 extra Divs, and a gaggle of ships. This does not bode well for Rommel, and rather than undermanning the agheila line in December, the allies after the fall of Bengahzi continue their advance, capturing Tripoli by the end of November 1941. The threats to germany's southern front now are very serious, with the collapse of italy imminent. I estimate the Germans will be forced to withdraw at least 6-8 divs to counter this problem, along with at least 500 aircraft. Straight away there goes your reserves for Typhoon, so the net overall effect on the chances of Axis success have actually decreased by Japan not attacking in the Far East.