Eisenhower in the Pacific: Part 1 The Shoestring Warriors of Luzon

The problem is, the Japanese really can't delay the DEI very much; it's the whole reason they launched the Southern Operation! They're running out of oil stocks. And there's the danger that every day they delay, the Dutch and British might sabotage the facilities. Yamamoto will do everything possible to keep that from happening.

But everything else would be up for grabs. Operations into New Guinea, Rabaul, the Solomons, even Burma could be endangered. There is only so much shipping to go around even if the IJA can be talked into diverting more forces from the Kwangtung Army.

the Dutch East Indies are the big prize and the over riding goal, all else is to serve getting that, along of course with Malaya. Burma is a second stage operation, but that invasion does not require amphibious forces. The 15th Army was moved to Thailand by sea and invaded Burma overland.

But securing the outer perimeter (Bismarks, Solomons, Gilbert Islands and even eastern New Guinea) are comparatively luxury operations in comparison to the others, and while the Navy wants them, it comes down to shipping and the shipping can't be everywhere at once. Add in the heavy losses in the Hawaiian Battles and the spare striking force to do everything at once isn't there either.
 
the Dutch East Indies are the big prize and the over riding goal, all else is to serve getting that, along of course with Malaya. Burma is a second stage operation, but that invasion does not require amphibious forces. The 15th Army was moved to Thailand by sea and invaded Burma overland.

But securing the outer perimeter (Bismarks, Solomons, Gilbert Islands and even eastern New Guinea) are comparatively luxury operations in comparison to the others, and while the Navy wants them, it comes down to shipping and the shipping can't be everywhere at once. Add in the heavy losses in the Hawaiian Battles and the spare striking force to do everything at once isn't there either.

More to the point, we know from our actual history that the Japanese were willing to move into the DEI despite the Philippines Campaign being still underway - they moved into Borneo beginning on Dec. 17 (before MacArthur had even evacuated into Bataan), and into Java in February, despite American resistance still continuing there. It's a real headache for them, but not enough to stop them from hitting their top priorities in the East Indies as fast as possible.

But all the other stuff? You're right - kind of a luxury. Maybe important luxuries; but not absolutely essential like the British and Dutch oil fields and refineries are.

15th Army is a good point to think about. They invaded overland, but the Japanese still needed shipping to get them to Thailand. That's shipping they may now need to divert additional forces to the Philippines. I think you have to take a hard look at what hulls are available at that point once a decision to reinforce the PI (and with what forces) is made. Everything destined for New Guinea and eastwards would be first on the chopping block, and you work down from there. I think they still need to keep the DEI Eastern Force intact, as they can't let the Allies have a chance at reinforcing Timor or Celebes, as that endangers the oil fields by air attack, and even might serve as bases for sub attack later on.

Honestly, though, once the Americans are confined to Bataan and Corregidor, the chief danger they represent, I would argue, is that of propaganda value; they can at least be contained and isolated there (they will have lost all of their air and naval assets anyway), and the smart move may be to wait until summer to finish them off after more critical objectives have been secured. But I doubt that the Japanese high command would have found that acceptable, judging by how they reacted in OTL to the delays Homma *did* have.
 
More to the point, we know from our actual history that the Japanese were willing to move into the DEI despite the Philippines Campaign being still underway - they moved into Borneo beginning on Dec. 17 (before MacArthur had even evacuated into Bataan), and into Java in February, despite American resistance still continuing there. It's a real headache for them, but not enough to stop them from hitting their top priorities in the East Indies as fast as possible.

But all the other stuff? You're right - kind of a luxury. Maybe important luxuries; but not absolutely essential like the British and Dutch oil fields and refineries are.

15th Army is a good point to think about. They invaded overland, but the Japanese still needed shipping to get them to Thailand. That's shipping they may now need to divert additional forces to the Philippines. I think you have to take a hard look at what hulls are available at that point once a decision to reinforce the PI (and with what forces) is made. Everything destined for New Guinea and eastwards would be first on the chopping block, and you work down from there. I think they still need to keep the DEI Eastern Force intact, as they can't let the Allies have a chance at reinforcing Timor or Celebes, as that endangers the oil fields by air attack, and even might serve as bases for sub attack later on.

Honestly, though, once the Americans are confined to Bataan and Corregidor, the chief danger they represent, I would argue, is that of propaganda value; they can at least be contained and isolated there (they will have lost all of their air and naval assets anyway), and the smart move may be to wait until summer to finish them off after more critical objectives have been secured. But I doubt that the Japanese high command would have found that acceptable, judging by how they reacted in OTL to the delays Homma *did* have.

I have a more or less running count in my notes (regarding ships) and I am keeping track of losses. I am not going to clutter up threads with them (and most are hand written notes anyway). There have been major changes already from the OTL allocation of ships and escorts, as well as troops assigned. Most of which the readers have not yet seen as it hasn't happened yet in the story.

Luckily I did a lot of the basic research already when I did the "Gorings Reich" timeline which helps speed things along a bit although that one had an earlier POD in the Pacific.
 
When will the stories begin about The Relief, the mile-long convoy of ships with supplies and reinforcements coming to the Philippines?

How about the rescue team of Negro (as the polite ones would have said then) cavalrymen riding white horses?

"We're the Battling Bastards of Bataan!
No Momma, no Poppa, no Uncle Sam!
No aunts, no uncles, no cousins, no nieces,
No pills, no planes, no artillery pieces!
And nobody gives a damn."

by Frank Hewlett 1942
 
When will the stories begin about The Relief, the mile-long convoy of ships with supplies and reinforcements coming to the Philippines?

How about the rescue team of Negro (as the polite ones would have said then) cavalrymen riding white horses?

"We're the Battling Bastards of Bataan!
No Momma, no Poppa, no Uncle Sam!
No aunts, no uncles, no cousins, no nieces,
No pills, no planes, no artillery pieces!
And nobody gives a damn."

by Frank Hewlett 1942

too early for desperate dreams caused in part by loss of hope but also starvation and malaria

not that the malaria at least won't come soon enough
 
GB will tell the tale in good time...

Still, our author has had the US commanders better prepare locations down the archipelago as well as better preparation of the main bastion on Bataan. The fight could drag out for longer than in history and spread down the line. With the fight on northern Luzon taking longer and costing the Japanese more resources, their historic successes in the DEI and Malaya are going to be delayed and perhaps jeopardized? So, there may be more retreat paths compared to history.

In one of the posts when the war in this thread started the author said that the recon of japanese AFs on Formossa would be useless for two years. I assumed PI will fall eventually and in 1943 the USN return with a venegance
 
you can safely assume that Eisenhower is going to be ordered out, after all this is Eisenhower in the Pacific Part 1


The tricky part is when to pull him out.

His forces will be in better shape than MacArthur's. But the real problem is the collapse in the Allied position in the East Indies - he's got to somehow evacuate through hundreds of miles of increasingly contested sea and air space. The longer you wait, the more dangerous extraction becomes.

In OTL, the turning point was the fall of Singapore (Feb 15). That sealed ABDA's fate, and immediately pushed FDR and Churchill to establish a new Southwest Pacific Theater based out of Australia, and that theater would require a senior American commander. Ike would not be as senior as MacArthur was, but he might be senior enough; and Marshall knows well his true worth.
 
As long as the medical supplies (basically quinine) hold out the malaria problem will be under control. The military physicians in the PI know what to do to minimize the risk, and now the medical supply situation (and supplies of mosquito nets, stuff to spray on standing water etc) is much, much better than OTL. It is not only Bataan and Luzon that is better prepared. The southern islands have better defenses and troops and the Japanese landings there have been delayed, and I expect will be delayed again as troops are needed on Luzon and the shipping needed elsewhere. The problem for the Japanese is that if some of the Southern PI and/or Western New Guinea remain in Allied hands, there is the ability to launch air attacks on shipping from Borneo/DEI/Malaya - protecting the sea lanes from there to Japan was the whole reason for attacking the PI (and by extension Pearl Harbor). IMHO they will have to take the Southern PI to protect the sea lanes, and this will happen much later than OTL and eat many more resources.
 
Until the surrender of Bataan U.S. submarines made routine trip s to Miravales bring in supplies, and taking out essential ( radar teams, and the CAST intercept and codebreaker teams, as well as Phillipines gold. So getting Ike out was really not a problem.. Sub to a point where he can transfer to a PBY or B-17, or the full trip to NEI or Australia by sub.
 
Up until January 4 the Americans have the ability to fly DC3 and DC2 aircraft from Bataan and Clark (and for that matter Del Carmen as well) to Cebu or Del Monte Field where they can be refueled and fly on to Java (where aircraft change occurs). Beechcraft 18 twin engine light transport aircraft (C45 Expediter in later military versions) have the same range. This allows 4 stretcher / 8 passengers on the C45s, and up to 10 stretchers / 24 passengers on the C39/C47 aircraft.

Most of the heavily wounded from the air attacks were already evacuated by sea prior to the Japanese amphibious assault (the Evacuation chapter).

But the important thing is that the Americans still have around a dozen medium and a bit more than that light transport aircraft and prearranged fields to serve them. Also available a handful of the remaining B10s and B18s and the Navy can provide a few Catalina's if need be. The DC3 and Catalina can also reach Singapore at this point from the Manila / Clark Field area. Only the really critical people will go out by air though... generally an American who would not survive in captivity with the wounds they have who is likely to survive recovery. A Filipino will be sent to a civilian hospital as long as that is possible, while those who are hopeless will not be evacuated (triage rules do apply). Even then some hard decisions have to be made about who gets sent out.

Of course there is also submarine as well... which is historically how Quezon and most of the other Filipino civilian government people as well as Ayres and his staff were evacuated. Eisenhower is not going to ride PT boat though, he has better things for PT boats to be doing at this point

nearly done with the retreat to Bataan... hopefully posting that tomorrow

More on the evacuation and supply route later in an actual chapter but this should give people an idea of how things are going thus far

The military airlift TTL did not exist OTL. Historically it consisted of Pappy Gunn and his twin Beech ... which is a very limited operation to say the least.
 
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Looking forward to the next update when you can. I am sure it will be filled with heartbreak for the US and Filipinos, but maybe they can still get in a few licks against the Japanese.
 
Of course, a wargame is still only as valid as its inputs; and that requires some human evaluation...

But if we get any consensus out of these various Pacific War timelines, it is this: It really takes very little in terms of a pre-war point of departure to generate markedly better results from the Allies. It really was just about leadership, not some technological breakthrough, vastly more resources, or a very early departure. And by leadership, you don't even need military geniuses, just reasonably competent ones. The Pacific War we got up through the spring of '42 really was a huge Japan-wank, and so much of it was because of terrible, blundering Allied leadership - some of it in Washington and London, but especially by MacArthur and Percival.

The Americans are still going to lose the Philippines. But Galveston putting Parsons/Ike in charge, and the decisions that followed, is going to push back the final defeat to well into the summer, and seriously tear up Japanese timetables. Honestly, even replacing MacArthur with Ike on December 1, 1941 could produce markedly better results.

Wouldn't disagree at all-Japanese early successes were on a very fragile basis.

On wider, general notes:
Thanks to GB went and read Zimm's attack on Pearl Harbor - in a nutshell OTL you come away with the impression of a flawed, rigid attacker coming up against unpreparedness and bad leadership decisions. GB's TL is better attacker execution hitting better led, better prepared defense - and compared to OTL Japanese lose a lot more planes they can't afford to lose. What's striking from the PH book is what a profound lack of clear thinking and connection there was between the Japanese original strategy of letting US come to them and throwing that out for a strategy that was more going out after the US and establishing a perimeter without taking action to properly support the new strategy - the latter requiring way more resources, logistics, ect, they didn't have/couldn't come up with in time after changing strategies. The PH-Zimm book really reinforces impressions from Shattered Sword on general Japanese war-making strategy, planning, and execution.

Will never forget what Shattered Sword said at the end of the chapter Why Did Japan Lose?:
"In the final analysis, it is no exaggeration to say that the conflict the Japanese military instigated in 1941 was not only beyond its resources, but also beyond its understanding".

Partly from reading these timelines, have gone back to getting through Akira Iriye's Across the Pacific to try and get some background on the Japanese perspective on going to war with the US. It's an old book originally written in 1967 and then updated in the 90's, got from a friend. It deals with how Japan, China, and the U.S. saw and dealt with each other over time. Wonder if anyone else here familiar with it. What's important here is that it deals along the way with the Japanese mindset in absorbing modern, western, industrial technology, ideas, and approaches - and the frictions therein with its own traditions.
 
A Series of Brave Stands: The Retreat to Bataan December 25 1941 - January 8, 1942
A Series of Brave Stands: The Retreat to Bataan
Eisenhower orders General Ord and his II Corps, now reinforced with the 1st PA Infantry Division, to hold the Japanese up as long as possible in the Lake Taal area. General King is ordered to send the 51st Infantry Division to move north and then east into the Zambalas Mountains to take up position for a potential counterattack later. General King is ordered to send his corps artillery, as well as the corps artillery from I Corps which is already being evacuated and concentrate at San Fernando.

Wainwright meanwhile moves the 11th PA Division and 6th Cavalry brigade up to cover the withdrawal of the 12th and 23rd Divisions as well as corps artillery and all of the tanks of the 192nd and 194th battalions. The units pulled out are to pull back to San Fernando and take all the stores and supplies with them that they can carry with them. Everything that can be moved by railroad, at night, is to be moved right away.

The American pull back is aided a 24 hour pause by the Japanese, as they have to resupply and reorganize as well. However the Japanese land the 65th Infantry Brigade (which is nearly a division in size) as well as the remainder of the 4th Division is landed at Vigan. This Japanese pause however will have consequences, as the American troops, except for half of the 101st MP brigade which is under heavy pressure by the Japanese 4th Division, are able to break contact cleanly, and it allows plenty of time for the evacuation of the wounded, supplies, stores, support units and then combat units with little hindrance.

Further south the 21st Infantry Division has more difficulty. General Taniguchi pushes his division hard, according to Japanese doctrine of speed and still more speed to push forward and keep the enemy off balance. His supply situation however is not as stressed as the main force that has just fought a major battle further north. To break away, General Vincente Lim is forced to leave the 1/23rd behind at San Pablo to hold to the last bullet to buy more time.

The rivers and jungle that made the American counterattack a series of piecemeal actions however also works against the Japanese now, who slowed considerably as they expand their beachhead, and that expansion is aided by American motorized and horse cavalry troopers of the Texas / Montana 112th Cavalry and Philippine Scouts 26th Cavalry regiments. The Americans give the Japanese a very bloody nose on December 26 when they catch two depleted battalions of the 2nd Formosa Regiment crossing the Bued River and in a sharp counterattack by the 1st Squadron / 26th Cavalry on horse back and A Troop/1st Squadron / 112th Cavalry in trucks, scout cars aided by some half tracks with 75 mm guns overrun the two battalions and kill 300 Japanese soldiers at the cost of only 100 casualties. Both battalions are wrecked and have to be pulled out of the line, effectively reducing the 48th Division by an entire regiment as the remaining battalion of the 2nd Formosa was severely reduced already. Among the casualties is the commander of the 2nd Formosa who is relieved for cause and soon after takes his own life. 1st Lieutenant Edwin Ramsey, 26th Cavalry, who led the horse cavalry charge, is awarded the Silver Star for this action and within weeks is assigned to General Eisenhower as his aide-de-camp.

Boxing Day would remain an honored holiday in the Cavalry Branch of the US Army for generations to come.

On December 27 the Japanese land a brigade of Special Naval Landing Force troops at Palawig and shortly thereafter size Iba Field which they promptly begin to repair. They meet no resistance upon landing. However further north on this day the 101st MP Brigade, now redesignated the 101st Infantry Brigade (although it receives no replacements, reinforcements or extra supplies to make this more than a empty honor) fights a determined battle outside of Baguio with the 102nd Regiment and further east at Bessang Pass the 101st Regiment/101st Infantry Brigade inflicts a shattering ambush on the Japanese 37th Infantry Brigade / 4th Infantry Division, inflicting over 1,000 casualties and leaving it disorganized and combat ineffective for 3 days. Further south around Lake Taal the Japanese 16th Division finds a solid line, and with only two regiments available, General Homma orders it to hold off attacking until the rest of the 14th Army is closer to Manila but to detach troops to secure Balayan Bay and its useful port.

Homma is still waiting for replacements as his losses have been far heavier than expected and now two of his four major combat formations are at reduced combat effectiveness. Ammunition expenditures have been far heavier than planned as well. However his engineers have rebuilt the piers at Damortis and Lingayen allowing ships to actual unload directly ashore instead of having to rely on his overworked landing craft.

Meanwhile in Tokyo the General Staff is shocked that the Americans have managed to inflict over 13,000 combat casualties on the 14th Army in the first two weeks of the campaign, a number far higher than expected or planned for. Over 60 tanks have been lost as well as dozens of other motor vehicles and officer casualties have been particularly heavy. The 38th Infantry Division, which has recently captured Hong Kong, is alerted for likely deployment to Luzon as soon as shipping is available.

The 65th Infantry Brigade runs into the 11th PA Division and attached 43rd Infantry Regiment, and is forced to deploy in preparation for a set piece attack, which takes two days to set up in the dense jungle at which point the American troops withdraw leaving the attack to fall upon empty jungle. However General Homma is able to claim a victory on December 31 as the 4th Infantry Division enters Baguio, the summer capital of the Commonwealth of the Philippines and the Filipinos retreat from Bessang Pass. The 16th Division meanwhile probes the positions held by the 1st and 21st Division north of Lake Taal, but meanwhile has sent half of its force south to take Balayan which will outflank the American position. General Ord is aware of the Japanese progress but the small skirmishes gives him a chance to blood the 1st Infantry Division which had not yet been in contact with the enemy. The survivors of the 102nd Regiment/101st Infantry Brigade, all 400 of them, disband and go into the mountains to form the basis of what will eventually be a significant partisan movement in the Carabal Mountains by 1944.

On January 2, satisfied that the overwhelming majority of supplies and equipment have been evacuated, and with the bulk of his force now within reasonable distance of Bataan, he orders III Corps (12th and 23rd Divisions) which have mostly completed refitting, to be reissued their trucks so that they can begin pulling back from San Fernando to Bataan.

Meanwhile, the nearly 24,000 engineers of the Filipino 1st, 3rd and 4th Engineer brigades have been working for weeks to prepare Bataan for defense. One of the most important measures have been widespread efforts for mosquito control, as Bataan has a frighteningly high rate of the disease in peacetime. Most of the 20,000 civilians have been evacuated from the area or in the case of nearly 10,000 of them, put to work raising poultry, pigs and fish, or assisting the hospitals. The military engineering efforts have prepared two defense lines, and nearly every strand of barbed wire in Luzon is now in place, as well as hundreds of 3 inch mortar rounds converted into anti-personnel mines.

Food for nearly 100,000 people is now in place to last at least 9 months. Although Eisenhower knows he will run out of ammunition and men long before then when the Japanese attack for long enough, at least his men will fight in reasonable health.

Meanwhile on that same date, the 51st Infantry Division (PA) attacks a battalion of the 1st SNLF defending the Iba Field area, catching it by surprise. The Japanese are thrown back 4 kilometers but regroup and counter attack but merely stabilize the line. The 51st then retreats east back into the Zambales Mountains having suffered 400 casualties but earning valuable experience while forcing the Japanese to remain cautious. The Japanese 65th prepares another deliberate attack, this time against two battalions of the 43rd Philippine Scouts Regiment which are holding the line as the 11th Division has been pulled out by rail, and awaiting relief by the 26th Cavalry. The Japanese gain some ground as the Filipinos fall back in the jungle and otherwise achieve very little. However Balayan finally falls this date and Ord gives the command for his corps to prepare to retreat.

Manila is being stripped of everything of potential military value which continues to flow across Manila Bay by boat and barge every night, or by rail and road. The Commonwealth Government has already been reduced to a skeleton staff in the city, with the President, Vice President and several legislators and judges flown out via Cebu to Java and then Australia. With them are sent over 1,000 people, including staff and family members with only High Commissioner Sayre, Secretary of Justice Santos and Secretary of Defense Valdes remaining behind in Manila of the war cabinet, the rest having been evacuated. The city meanwhile is subject to daily bombing but as the Japanese Army has only 20-25 Lily bombers available at any one time for the mission, damage remains acceptable and so are casualties except of course for those actually personally affected. The city remains defended by the only a few batteries of 3 inch guns of the 3rd and 4th Philippine Coast Artillery, enough to keep the enemy bombers high but not enough to really defend the city. However while civilian casualties since the war began total nearly 8,000, the city continues to function.

Meanwhile Eisenhower moves his headquarters and the majority of his staff to Corregidor on January 2, although he and his forward staff remain at San Fernando overseeing the final phases of the withdrawal. He also orders that the engineers be used as a source of replacements for the Philippine Army and Philippine Scouts infantry battalions which sorely need men to replace their losses to date. This provides his infantry with nearly 6,000 well trained (at least in terms of discipline) men and with combat experienced NCOs and officers in the regiments will be able to rapidly make int useful infantrymen.

Among the final steps to prepare for siege is the disposition of the wounded. To date the US Army Far East (ground forces) have suffered just over 10,000 combat casualties. Of these 2,000 are POWs in Japanese hands, mostly from the battered 21st Infantry Division which lost a regiment at Lamon Bay. Another 3,000 are killed or missing. Of the 5,000 wounded, half are expected to be out of action for over 30 days. Of these 2,500 men, all but 400 are Filipinos. These wounded are shifted to civilian hospitals or to their homes if possible. The American severely wounded, as well as the Filipinos who have wounds they are likely to recover from soon are shifted to hospitals in Bataan. A small flow of those American seriously wounded are evacuated by air (about 20 a day) by air transport to Cebu and Del Monte, where previously an evacuation hospital had been established. A trickle of medical supplies continues to come in by that same air route, although those supplies have to compete for space with other vital parts and supplies.

Eisenhower orders the Chennault and most of the remainder of the US Army Air Force Far East (USAFFE) out of the Philippines on January 3. A composite group consisting of the remaining fighters, light bombers and harassment aircraft will remain in Bataan, along with a ground element and squadron of volunteer pilots from the USAAF and PAAF. Heading this squadron is now Lieutenant Colonel William Dyess. Ground service crews will remain at Del Monte and Cebu to support the 4th Composite Group, which controls the remaining 30 medium and light transport aircraft that remain (Lieutenant Colonel Pappy Gunn, US Army Reserve), along with a few Navy float planes that are attached to the 16th Naval District. The seaplane tenders Childs and Preston, both converted 4 stack destroyers, make a final run to Bataan on January 2 with 100 infantry replacement volunteers from Cebu and nearly 300 tons of mortar rounds (60 and 81 mm) as well as a new SCR-270 radar set (all of which were rushed forward by those same two ships from Australia). Taking advantage of heavy rain, the ships remain until the night of January 3, allowing them to complete their offloading and take aboard 200 stretcher cases of American wounded. By good fortune both make it to Cebu without being detected, but sadly neither survives the Battle of the Celebes Sea. They are the last two American surface ships to leave Luzon successfully.

On the night of January 6, the last American and Filipino military and civilian government personnel evacuate Manila by boat. The Japanese 16th Division is a mere 20 kilometers away from both Manila and Cavite, while the Japanese 48th Division has patrols entering Camp O' Donnell. The only remaining major unit that is still outside of Bataan is the 6th Cavalry Brigade, and with the 26th Cavalry and 112th Cavalry both in position to retreat unimpeded. Both however are deployed in front of Clark Field in a final effort to once again make the Japanese deploy for an assault before they fall back and also to buy a little more time for the evacuation of useful salvaged equipment and parts.

The Japanese react as expected, and once again the American cavalry breaks off after a few skirmishes. The final demolition parties retreat through the cavalry screen as it retreats south and on January 8, 1942, the Japanese enter Manila and on that same date, the last of the American rear guard, A Troop/1 Squadron / 112th Cavalry Regiment, enters the Bataan defense line.

Homma is criticized in part for his slowness in pursuing the Americans after Lingayen Gulf, although he is defended by others who point out at his heavy losses, weakness in supply and the unexpected heavy resistance put up by Filipino troops, as strong as the Chinese resistance in the Battle of Shanghai back in 1937. General Homma keeps his job, but there are grumblings back in Tokyo and few see a role for him after the campaign is over. He is ordered to finish off the Americans as soon as possible.

Meanwhile in Bataan the siege is finally about to begin.


 
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that took a while to game, analyze, research and write as you can imagine... hopefully its reasonably clear. I will provide some maps later ... possibly today, more likely over the course of the week

next chapter will be an analysis of who has what left at this point in the Philippines

and I included the last cavalry charge of the US Army (albeit a bit larger in scope)
 
Love it - great update! The Philippine Campaign as it really should have been conducted.

the 26th Cavalry really did a wonderful job covering the historical retreat and I have seen Macarthur praised for his withdrawal. Although not much praise on how little the Americans managed to take with them in terms of supplies.

The cavalry in TTL consists of two regiments, one on horseback with some mechanized elements, and the other completely light mechanized with its horse troopers riding around on trucks (as dismounted infantry). Cavalry are exactly what is needed in covering a retreat. II Corps didn't have any cavalry support, but only faced one division instead of essentially three of them which is why most of it escaped as well.
 
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