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18.64MB - View From The Trenches

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putting 17 IJN airstrike factors-the four biggest<br />

carriers and Hosho-in the Central Pacific). How<br />

do we build an IJN task force in the Central<br />

Pacific between two extremes?<br />

First, the surface units are considered, since the<br />

Series Replay commentary suggested no carrier<br />

force in the area. Battleships should not be present<br />

if US carriers can get the upper hand in daylight.<br />

<strong>The</strong> SR commentary's assumed losses of one IJN<br />

cruiser per turn (assuming only one US carrier) are<br />

valid only if Japanese battleships aren't getting<br />

shot at first.<br />

So, surface IJN units in the Central Pacific can<br />

be battleship-heavy ONLY if enough light carriers<br />

are around to fight by day. <strong>The</strong> IJN carriers,<br />

trying to sink their American counterparts, will be<br />

sunk quickly, but the US player will have to<br />

gamble against nightfall.<br />

A night action in the Central Pacific will be<br />

unpleasant for the "location uncertain" US task<br />

forces. Each task force has two to three cruisers<br />

(none for the Saratoga's Group Y). Two US task<br />

forces, given a reasonable IJN six unit surface<br />

fleet, will find the escort cruisers ill matched<br />

against Japanese cruisers, even if battleships are<br />

absent. An appearance by only one US task force<br />

(1:6 probability for each group) is more likely.<br />

Carriers can be attacked if the escort is out-<br />

numbered numerically. <strong>The</strong> choice of which ships<br />

engage the escort is the attacker's, which could<br />

leave the Lexington, say, facing the Mutsu.<br />

Critical Issue #1 mandated six carriers for the<br />

Raid Force. This leaves Ryujo, Zuiho, and Hosho<br />

available. Hosho is too slow for the Raid Force,<br />

leaving the other two light carriers to pose a<br />

pivotal question: Who do they reinforce? Do they<br />

go with the Raid Force, adding to its clout? A valid<br />

choice, as it allows greater damage to a helpless<br />

target. Or, the Ryujo and Zuiho can join Hosho in<br />

setting an ambush for US carriers.<br />

Why such a strong IJN stance in the Central<br />

Pacific? Granted, there is a 49% chance of a US<br />

no-show. Conversely, there is a 51 % chance of US<br />

forces appearing, with nothing in the rules allow-<br />

ing them to flee before combat, unlike the Pearl<br />

Harbor raid. Putting Hosho, Ryujo, and Zuiho<br />

into the Central Pacific means a 51% chance to<br />

shoot at, and possibly eliminate, American<br />

carriers. A pre-emptive sinking of one or two US<br />

carriers may be worth more than all of Battleship<br />

Row.<br />

One final reason for a strong Central Pacific<br />

strategy for the IJN: Position. Japanese control of<br />

the area means that direct US raids from Pearl to<br />

Japan are blocked, and the same IJN control can<br />

mean the fall of Midway on Turn Two. An IJN<br />

fleet in the area can also cover an amphibious<br />

landing on the first or second turns, in addition to<br />

other duties.<br />

Failure to get and maintain IJN control over<br />

the Central Pacific, to underline its importance,<br />

will mean that the area becomes a gaping hole in<br />

IJN defenses, requiring diversion of forces from<br />

offensives into Allied rear areas. <strong>The</strong> IJN will find<br />

itself defending its own POC without reaching out<br />

for more. A US controlled Central Pacific exposes<br />

the guts of the entire Japanese Empire. Prevention<br />

of this will require strong IJN effort, and eventual<br />

seizure of Midway to deny it to the USAAF.<br />

CRITICAL ISSUE #3:<br />

<strong>The</strong> Home Islands, Turn One<br />

Japanese (and Allied) first turn strategy should<br />

include the Japanese and Marianas Islands areas.<br />

<strong>The</strong>se can't be left to the LBA. Critical Issue #2<br />

demonstrated the need for LBA in Indonesia.<br />

Further, the South Pacific and Marshall Islands<br />

can only be reached by air on Turn One.<br />

So, the Home Islands are left to the IJN<br />

surface fleet, which must be balanced against the<br />

needs of the Central Pacific and Raid forces.<br />

Three Allied cruisers (Houston, Exeter and De<br />

Ruyter) can challenge weak patrols, and endanger<br />

the Yokosuka marine unit if present.<br />

Home Islands deployment is a process of<br />

elimination. <strong>The</strong> IJN has two light cruisers, 18<br />

cruisers, four battlecruisers, and six battleships.<br />

<strong>The</strong> Raid Force will require ten cruisers and the<br />

battlecruisers, as discussed in Critical Issue #1. <strong>The</strong><br />

Central Pacific force will need enough surface<br />

units to face two US task forces-another six<br />

surface units at least. One light cruiser must be<br />

detailed to the Aleutians.<br />

<strong>The</strong> remainder should be balanced against the<br />

Central Pacific, which takes most of the slow<br />

(non-Raid Force) units. <strong>The</strong> Home Islands force<br />

must be able to match the three combined Allied<br />

cruisers in either area. Remember that a lucky<br />

disabling of one or two IJN ships and the IJN has<br />

lost a lot of POC unnecessarily.<br />

Finally, a look at the Aleutians. Posting a light<br />

cruiser there won't gain any POC, but it can<br />

achieve uncontested control on Turn One. A<br />

second turn there unmolested will mean the fall of<br />

Attu. <strong>The</strong> Allies will have more desperate business<br />

elsewhere on Turn Two; any Aleutian diversions<br />

could only help the IJN. Control of the area will<br />

hinder Allied re-entry; at least, IJN control will<br />

deny Allied POC and cover Japan's back door.<br />

Certainly, one light cruiser (which will have to base<br />

in Yokosuka) is about what the area rates-no<br />

more, no less.<br />

As for the rest of the board: <strong>The</strong> Marshalls and<br />

South Pacific are the only areas where LBA can<br />

extend beyond surface range. Allied cruisers can<br />

enter these areas, but a cruiser vs. LBA is no con-<br />

test. <strong>The</strong> board-edge areas (ignoring the Aleutians)<br />

are unreachable on Turn One from the IJN stand-<br />

point. This emphasizes the importance of the sur-<br />

prise missions at Pearl, Midway, and in Indonesia;<br />

attrition, not POC, is the predominant factor<br />

affecting the coming turns.<br />

CRITICAL ISSUE #4: Some Openings<br />

With the lessons of Critical Issues #1-3<br />

established, three openings can now be posed.<br />

<strong>The</strong>se examples of first turn deployment can be<br />

found on Chart 1.<br />

<strong>The</strong> Midway First plan shows how IJN forces<br />

can meet enemy forces in the Central Pacific (a<br />

51% chance of US forces appearing). <strong>The</strong> IJN<br />

Midway Force, with seven surface units, can take<br />

on one, even two, US task forces, and still threaten<br />

US carriers in a night action.<br />

<strong>The</strong> three CVLs of the Midway Force-Hosho,<br />

Ryujo, and Zuiho-are more than a match for one<br />

US carrier at five airstrike factors to four, and<br />

could hold out against two US carriers long<br />

enough to damage or sink one. Certainly, the IJN<br />

could prolong the battle long enough for a night<br />

action to come up; the law of averages will catch<br />

up sooner or later. Even if a night action doesn't<br />

occur, a loss of three IJN CVLs for two US<br />

carriers, or arguably even one, is worthwhile.<br />

<strong>The</strong> Midway First plan demonstrates the risks<br />

of weakening the Raid Force. <strong>The</strong> Raid Force has<br />

less chance of totalling Pearl Harbor, with the<br />

Ryujo and Zuiho absent. Conservative tactics<br />

would dictate that the second surprise strike go for<br />

undamaged battleships, in order to cripple as<br />

many as possible.<br />

<strong>The</strong> aim of the Raid Force, and the entire Mid-<br />

way First plan, is obviously to hit US carrier<br />

forces. So, this means spreading hits among the<br />

battleships to stop them from linking up with the<br />

carriers. <strong>The</strong>re'll be time later to finish them off. If<br />

the Raid Force can stay off Hawaii, then it can<br />

destroy any US task forces offering battle, or<br />

finish Battleship Row if not. Remember, though,<br />

that the weakened Raid Force has 22 airstrike<br />

factors-the exact strength of all five US carriers<br />

and the 7th AF; if the IJN is unfortunate enough<br />

to face all that, a withdrawal is in order, as the<br />

odds are against a night action.<br />

A word on secondary targets at Pearl: <strong>The</strong><br />

cruisers (New Orleans and Sun Francisco) and the<br />

7th AF take lower priorities to the battleships. <strong>The</strong><br />

cruisers, true, are of greater long term value as<br />

carrier escorts; the short-term question is if the<br />

IJN wants to face them or the Maryland class in a<br />

night action. As for the 7th AF, reread rules 12.22<br />

and 12.23; why take 16% chances on replaceable<br />

targets, when the chances of damaging or sinking<br />

ships permanently are one in three at Pearl?<br />

A final feature of the Midway First plan is rear<br />

area placement. Three IJN cruisers in each of the<br />

Home Islands areas is hardly excessive, as their<br />

only advantage over the DeRuyter, Exeter, and<br />

Houston is the enhancement of IJN gunnery<br />

factors. <strong>The</strong> IJN cruisers' speed is handy only in<br />

the pursuit, if they win.<br />

Since the 16 IJN cruisers are thus committed,<br />

the Midway surface force is mainly composed of<br />

battleships. <strong>The</strong> implications for a night action are<br />

obvious. Day actions are more likely, but why take<br />

such a gamble with American carriers so early?<br />

<strong>The</strong> second plan to consider is the Strong Raid<br />

plan. Every carrier capable of going to Hawaii,<br />

does. This leaves only Hosho to dispute the<br />

Central Pacific-if the Hosho sinks an American<br />

carrier, fine. Otherwise, the Midway Force will<br />

have to be capable of a quick withdrawal, which is<br />

why it is so constituted.<br />

Incidently, any Midway Force should have as<br />

many patrolling units as possible; raiders should<br />

be only those units which failed their speed rolls.<br />

<strong>The</strong>re is a 49% chance of no US presence, and IJN<br />

control of the area is critical.<br />

<strong>The</strong> risks in the Central Pacific mean that the<br />

IJN battle line is consigned to the Home Islands.<br />

This in turn frees more cruisers to fatten up the<br />

Raid Force, which IJN battleships are unable to<br />

do. <strong>The</strong> Raid Force itself, of course, is so powerful<br />

that it should aggressively seek any action with US<br />

units off Hawaii. Certainly, the strike on Pearl will<br />

be the largest possible.<br />

<strong>The</strong> Strong Raid plan shows how a beefed-up<br />

Raid Force can distort IJN dispositions elsewhere,<br />

mainly because of the switch of Zuiho and Ryujo.<br />

Unfortunately, the Raid Force is so formidible<br />

that the US player will probably use the "escape<br />

clause" in rule 18.35 and leave Hawaii. Result:<br />

Redundant IJN forces in Hawaii and a weak one<br />

off Midway with probable loss of the latter area.<br />

<strong>The</strong> third plan is a compromise in more than<br />

one sense of the word. Three airstrike factors go to<br />

the Central Pacific (Hosho and either of the re-<br />

maining light carriers will do) accompanied by<br />

cruisers, as a day action could be too risky for IJN<br />

battle units. <strong>The</strong> Midway Force should be able to<br />

take out a US task force, or maybe two, but the<br />

risks are manifest. <strong>The</strong> first IJN airstrike could be<br />

the last.<br />

Another problem with the Compromise plan is<br />

the addition of one light carrier to the Raid Force,<br />

oddly enough. This two factor reinforcement<br />

might not contribute anything tangible to the Pearl<br />

Harbor strike. This epitomizes the problems with<br />

the Compromise plan, which itself is presented for<br />

the sake of argument. This argument could well be<br />

resolved in favor of a more decisive strategy.<br />

Common to all three plans is the LBA and<br />

Aleutians deployment discussed in Critical Issue<br />

#3. <strong>The</strong> presence of LBA in Indonesia means that,<br />

in any first turn strategy, the IJN must look to the<br />

Central Pacific for a third line of attack.<br />

CRITICAL ISSUE #5: Another <strong>View</strong><br />

Besides the three plans discussed in Critical<br />

Issue #4, a fourth plan is worth considering. This<br />

plan, "Air Power in the Pacific," appeared in Vol.

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