Sample Scenario Orders for the Japanese in Scratch One Flat Top !, the Battle of the Coral Sea

Scratch One Flat Top !

Hakko Ichiu - Eight corners of the world under one roof

Japanese saying meaning the whole world under control of a single lord. The days prior to the Battle of Coral Sea was the time in history that Nippon was closest to achieving this.

Unprecedented sucess caused many officials in high positions in Japan to succumb to the so called "Victory Disease".
Rear Adm HARA Tadamichi

Historical Commentary

With the Runaway Victory at its peak, the Japanese sent an invasion force supported by carriers after Port Moresby, Papua. If the Japanese captured this base they would have a land airbase in range of northern and north eastern Australia, which the Allies could not allow. More importantly, Port Moresby was the only remaining Allied base from which offensive air operations continued to take place.

The Americans responded with two carrier groups of their own and the resulting Battle of the Coral Sea became the first sea battle in history in which the attacks on enemy ships were conducted solely by aircraft, and the opposing fleets never came within visual contact of each other.

It was also the first time the Americans were able to sink a Japanese ship of larger than destroyer size, the light carrier Shoho. Once the Shoho had been badly hit and was clearly on its way to the deep, a jubilant American pilot radioed back to the task force "Scratch one flat top!".

An operational draw, Coral Sea was a strategic victory for the Americans because it was the first time in the war that the Japanese had been turned back without capturing their objective.

Scenario Type

Carrier battle and amphibious invasion, best played at Lieutenant's level or higher.

Scenario Length

0900 hours 30 April 1942 &endash; 1600 hours 10 May 1942

duration 11 days, 7 hours

Scenario Location

The following areas are active for the Japanese:

Australia-Coral Sea
Central Pacific
New Guinea-Solomon Sea
South Pacific

Japanese Briefing - Scratch One Flat Top !

To

Vice Adm INOUE Shigeyoshi, Commander 4th Fleet

From

Admiral YAMAMOTO Isoroku, Commander in Chief Combined Fleet

Date

1 April 1942

Orders

Use the substantial forces being made available to you to execute Operation MO as issued by Imperial General Headquarters to continue expansion of the defensive perimeter.

Capture Port Moresby, Papua and Tulagi Island at the southern end of the Solomons, and establish a seaplane base to support flying boat operations at Misima Island off New Guinea's eastern tip.

Operation MO must be completed by the 10th of May so Shokaku and Zuikaku will have time to replenish and join in the Midway attack.

Objectives

Invade Port Moresby by sea.

Meet and destroy any United States Naval forces responding to this action.

Capture Tulagi to guard the eastern flank of our forces in New Guinea and Papua.

Place your carriers between northern Australia and the Port Moresby invasion forces to provide an airscreen against enemy air attack from the Australian mainland.

Situation

By late April you have gathered over 50 warships and transports for this operation, most of them currently at Truk in the Central Pacific, or Rabaul in the New Guinea-Solomon Sea area. These include 2 fleet carriers, 1 light carrier, 1 seaplane tender, 7 heavy cruisers, 4 light cruisers, 15 destroyers, and 12 transports and auxiliaries. You have the land based air support of the 25th Air Flotilla at Rabaul. Available ground forces are the elite Nankai Detachment of Army troops and Special Naval Landing Forces.

With the success of this operation we will be only one step away from completing the advance to cut the supply line between the United States and Australia, and only minor forces will remain in the way of a final operation once Port Moresby is captured.

Deployment

The MO Distant Cover Force, and MO Distant Cover Force Main Body, under Rear Adm GOTO Aritomo. Already at sea, they sortied from Truk on 28 April. Currently west of New Ireland and north of the Solomons, these forces must support other task forces attacking Tulagi and Port Moresby. Once Tulagi has been captured, proceed to Port Moresby to provide offshore support of the invasion and protect the Invasion Force.

The Port Moresby Invasion Close Cover Force under Rear Adm MARUMO Kuninori. This force will establish a seplane base at Misima Island off New Guinea to support Port Moresby operations as a refueling base for flying boats. It sailed from Rabaul on 29 April and is currently 60 nm west of Tulagi in the southern Solomon Islands.

The Tulagi Occupation Force under Vice Adm SHIMA Kyohide. It will sortie from Rabaul at 0830 on 30 April, and proceed south down the Solomons. It carries troops to land at Tulagi and establish a seplane base there capable of supporting flying boat and floatplane operations.

The Carrier Strike Force under Vice Adm TAKAGI Takeo. It will sortie from Truk at 0600 hours 1 May to support Operation MO as required.

The Port Moresby Invasion Force under Rear Adm ABE Koso. It will sortie from Rabaul at 0600 on 4 May, and proceed along the coast of New Guinea to land troops at Port Moresby. These units must capture the town, airfield, port and any other military installations there.

The Port Moresby Attack Force under Rear Adm KAJIOKA Sadamichi. It will sortie from Rabaul at 0600 on 5 May, and proceed along the coast of New Guinea to provide fire support to and close protection of the Port Moresby Invasion Force.

The 25th Air Flotilla is deployed at Lae and Salamaua, in New Guinea, and Rabaul, New Ireland. They are free to support operations as required.

Intelligence

A small Australian force may be occupying Tulagi.

Expect heavy opposition from land based air and ground units at Port Moresby.

American carrier forces may be in the area. Be prepared for their presence and use long range flying boats to spot them before your own carriers are seen. Flying boats can immediately be flown into Tulagi and Misima Islands with their capture and the successful positioning of a seaplane tender at the latter.

Expect local land based air opposition along the east coast of Australia. Avoid approaching it during this operation if possible.

Intra-Service Rivalry

The Japanese player is acting as the Navy for the duration of this scenario, with Army ground units of the Nakai Detachment under direct Navy control for the full length of the scenario.

Special Conditions

1. The light cruiser Kashima must remain anchored in Rabaul for the duration of the scenario, and may not sortie for any reason unless Allied ships are spotted within 50 nm of its location.

2. All units are considerered to be in a state of full supply. Ships beginning the game in port have full fuel loads, those beginning the game at sea have used fuel to cover the distance traveled from port of origin to current position at cruising speed. Japanese ground units landing at Tulagi and Port Moresby use normal combat supply from the invasion forces until they have achieved the conditions which will enable them to be supplied through use of local supply points.

3. The Japanese may only land ground troops at Tulagi and Port Moresby during this scenario.

Options

1. Agressive Japanese movement. The Japanese player may issue orders immediately to all task forces. He is not restricted to historical activation dates and this gives the player more flexibility in creating his own operational plan.

2. I-28 Engine Trouble. During the battle submarine I-28 returned to Truk with engine trouble. This option allows you to have I-28 suffer this fate or not. If you do not choose this option the ship begins the game anchored at Truk with engine trouble, and may not move for the length of the scenario. If you enable this option the ship will remain available for the full length of the scenario and begin with the rest of the 8th Submarine Squadron picket line. This gives the Japanese player a relatively minor increase in strength.

Victory Requirements

Objective 1: Capture and establish a seaplane base at Tulagi in the southern Solomons.

Objective 2: Establish a seaplane base at Misima Island, east of New Guinea.

Objective 3: Capture Port Moresby, Papua.

Objective 4: Prevent damage to your own carriers while defeating all naval forces sent against you.

The Japanese gain a strategic victory if they achieve all 4 objectives.

The Japanese gain an operational-strategic victory if they achieve 3 of the 4 objectives.

The Japanese gain an operational victory if they achieve 2 of the 4 objectives.

The Japanese gain a tactical victory if they any 1 of the 4 objectives.

The Americans gain a tactical victory if the Japanese achieve only 2 of their objectives, as long as Objective 3 is not one of them.

The Americans gain an operational victory if the Japanese achieve only 1 of their objectives, which may not be Objective 3.

The Americans gain a strategic victory if the Japanese achieve none of their objectives.

Initiative

The Japanese maintain a strategic offensive in all areas the scenario uses.

All forces are free to engage as the player sees fit once they are released for the operation.

Order of Battle Notes

The Japanese forces in this scenario are described in 2 ways, by Organization, which demonstrates the command pathways, and by Deployment, which indicates how the units are grouped at the start of the scenario.

For those unfamiliar with Japanese aircraft designations, the following may be helpful:

Designation

Allied Code Name

Type

A5M4

Claude

carrier fighter

A6M2/21

Zero

carrier fighter

A6M2-N

Rufe

floatplane fighter

B5N2/12

Kate

torpedo bomber

D3A1/11

Val

dive bomber

E7K2

Alf

floatplane

E13A1/11

Jake

floatplane

E14Y1/11

Glen

submarine floatplane

F1M2

Pete

floatplane

G3M2/22

Nell

medium bomber

G4M1/12

Betty

medium bomber

H6K5/23

Mavis

flying boat

JAPANESE ORDER OF BATTLE by Organization

4 Fleet

Headquarters

Vice Adm INOUE Shigeyoshi

Iro

AO

no aircraft

Kashima

CL/T

1 x E7K2

25 Air Flotilla

Command

Rear Adm YAMADA Sadayoshi

4 Air Group

land based air unit

17 (12) x G4M1/12

Genzan Air Group

land based air unit

25 (1) x G3M2/22

Tainan Air Group

land based air unit

18 (10) x A6M2/21, 6 x A5M4

Yokohama Air Group

water based air unit

12 (8) x H6K5/23, 9 (3) x A6M2-N

Tulagi Occupation Force

Command

Vice Adm SHIMA Kyohide

Azumasan Maru

AP

no aircraft

Hagoromo Maru

MSM

no aircraft

Koei Maru

MLM

no aircraft

Noshiro Maru No. 2

MSM

no aircraft

Okinoshima

ML

1 x E7K2

Tama Maru

MSM

no aircraft

Tama Maru No. 8

SCM

no aircraft

Toshi Maru No. 3

SCM

no aircraft

23 Destroyer Squadron

Formation

no officer assigned

Kikutsuki

DE

no aircraft

Yuzuki

DE

no aircraft

1 Minesweeper Squadron

Formation

no officer assigned

MS No. 1

MS

no aircraft

MS No. 2

MS

no aircraft

Submarine Force

Command

no officer assigned

I-21

SS Scout

1 x E14Y1/11

I-27

SS Scout

1 x E14Y1/11

21 Submarine Division

Formation

no officer assigned

RO-33

SS

no aircraft

RO-34

SS

no aircraft

Patrol Group

Formation

no officer assigned

I-22

SS Midget

1 x Type A Midget Sub

I-24

SS Midget

1 x Type A Midget Sub

I-28

SS Scout

1 x E14Y1/11

I-29

SS Scout

1 x E14Y1/11

Nankai Detachment

Command

Maj Gen HORII Tomitaro

55 Infantry Corps HQ

Command

amphibious trained

144 Infantry Rgt

Infantry

amphibious trained

55 Cavalry Rgt, 3 Co

Cavalry

amphibious trained

55 Engineer Rgt, 1 Co

Engineer

amphibious trained

47 Field AA Gun Bn, 1 Co

Anti-Aircraft

amphibious trained

Kure 3 SNLF

Marine

amphibious trained

Port Moresby Invasion Group

Headquarters

Rear Adm GOTO Aritomo

Akibasan Maru

AP

no aircraft

Asakasan Maru

AP

no aircraft

Chaina Maru

AP

no aircraft

Chowa Maru

AP

no aircraft

Goyo Maru (1)

AOM

no aircraft

Goyo Maru (2)

AP

no aircraft

Hibi Maru

AP

no aircraft

Hoyo Maru

AOM

no aircraft

Kamikawa Maru

STM

6 (2) x F1M2, 3 (1) x E13A1/11

Matsue Maru

AP

no aircraft

Mito Maru

AP

no aircraft

Mogamigawa Maru

AP

no aircraft

Ojima

Repr

no aircraft

Sazanami

DD

no aircraft

Shoho

CVL

12 x A6M2/21, 9 x B5N2/12

Shoka Maru

AP

no aircraft

Taifuku Maru

AP

no aircraft

Tokiwa

ML

no aircraft

Tsugaru

ML

1 x E7K2

6 Squadron

Command

Rear Adm GOTO Aritomo

Aoba

CA

1 (1) x E13A1/11

Furutaka

CA

1 (1) x E13A1/11

Kako

CA

1 (1) x E13A1/11

Kinugasa

CA

1 (1) x E13A1/11

18 Squadron

Command

Rear Adm MARUMO Kuninori

Tatsuta

CL

no aircraft

Tenryu

CL

no aircraft

6 Torpedoboat Flotilla

Command

Rear Adm KAJIOKA Sadamichi

Yubari

CL

no aircraft

29 Destroyer Squadron

Formation

no officer assigned

Asanagi

DE

no aircraft

Oite

DE

no aircraft

30 Destroyer Squadron

Formation

no officer assigned

Mochitsuki

DE

no aircraft

Mutsuki

DE

no aircraft

Yayoi

DE

no aircraft

5 Special Gunboat Squadron

Formation

no officer assigned

Keijo Maru

GBM

no aircraft

Nikkai Maru

GBM-MLM

no aircraft

Seikai Maru

GBM

no aircraft

15 Special Minesweeper Squadron

Formation

no officer assigned

Fumi Maru No. 2

MSM

no aircraft

Seki Maru No. 3

MSM

no aircraft

Carrier Strike Force

Headquarters

Vice Adm TAKAGI Takeo

Toho Maru

AOM

no aircraft

5 Air Division

Command

Rear Adm HARA Tadaichi

Shokaku

CV

21 (3) x A6M2/21, 20 x D3A1/11, 21 x B5N2/12

Zuikaku

CV

21 x A6M2/21, 21 x D3A1/11, 21 x B5N2/12

5 Squadron

Command

Vice Adm TAKAGI Takeo

Ashigara

AP

1 (1) x F1M2, 1 x E13A1/11

Haguro

AP

1 (1) x F1M2, 1 x E13A1/11

Myoko

AOM

1 (1) x F1M2, 1 x E13A1/11

1 Torpedoboat Flotilla

Command

no officer assigned

27 Destroyer Squadron

Formation

no officer assigned

Ariake

DD

no aircraft

Shigure

DD

no aircraft

Shiratsuyu

DD

no aircraft

Yugure

DD

no aircraft

7 Destroyer Squadron

Formation

no officer assigned

Akebono

DD

no aircraft

Ushio

DD

no aircraft

 

JAPANESE ORDER OF BATTLE by Deployment

Vice Adm INOUYE Shigeyoshi

4 Fleet

Kashima

Genzan Air Group

6 x G3M2/22

East Airfield, Rabaul

Tainan Air Group

7 (6) x A6M2/21, 4 x A5M4

East Airfield, Rabaul

4 Air Group

6 (9) x G4M1/12

Lae Airfield, New Guinea

Tainan Air Group

11 (4) x A6M2/21

Lae Airfield, New Guinea

Iro

AO

Shortlands

Kashima

CL/T

Simpson Harbor, Rabaul (docked)

Yokohama Air Group

12 (8) x H6K5/23

Simpson Harbor, Rabaul

Yokohama Air Group

9 (3) x A6M2-N

Simpson Harbor, Rabaul (for transfer to Tulagi)

4 Air Group

11 (3) x G4M1/12

Vanukanau Airfield, Rabaul

Genzan Air Group

19 (1) x G3M2/22

Vanukanau Airfield, Rabaul

Tainan Air Group

2 x A5M4

Vanukanau Airfield, Rabaul

Task Force J1 - Carrier Strike Force

Rear Adm HARA Tadaichi

5 Air Division

Shokaku

Vice Adm TAKAGI

Carrier Strike Force, 5 Squadron

Myoko

Akebono

DD

no aircraft

Ariake

DD

no aircraft

Ashigara

CA

1 (1) x F1M2, 1 x E13A1/11

Haguro

CA

1 (1) x F1M2, 1 x E13A1/11

Myoko

CA

1 (1) x F1M2, 1 x E13A1/11

Shigure

DD

no aircraft

Shiratsuyu

DD

no aircraft

Shokaku

CV

21 (3) x A6M2/21, 20 x D3A1/11, 21 x B5N2/12

Toho Maru

AOM

no aircraft

Ushio

DD

no aircraft

Yugure

DD

no aircraft

Zuikaku

CV

21 x A6M2/21, 21 x D3A1/11, 21 x B5N2/12

Task Force J2 - The Tulagi Occupation Force

Vice Adm SHIMA Kyohide

Tulagi Occupation Force

Okinoshima

Azumasan Maru

AP

no aircraft

Hagoromo Maru

MSM

no aircraft

Kikutsuki

DE

no aircraft

Koei Maru

MLM

no aircraft

MS No. 1

MS

no aircraft

MS No. 2

MS

no aircraft

Noshiro Maru No. 2

MSM

no aircraft

Okinoshima

ML

1 x E7K2

Tama Maru

MSM

no aircraft

Tama Maru No. 8

SCM

no aircraft

Toshi Maru No. 3

SCM

no aircraft

Yuzuki

DE

no aircraft

Kure SNLF

Marine

Azumasan Maru

Naval Construction Battalion

Construction

Azumasan Maru

Task Force J3 - Port Moresby Attack Force

Rear Adm KAJIOKA Sadamichi

6 Torpedoboat Flotilla

Yubari

Asanagi

DE

no aircraft

Mochitsuki

DE

no aircraft

Mutsuki

DE

no aircraft

Oite

DE

no aircraft

Yayoi

DE

no aircraft

Yubari

CL

no aircraft

Task Force J4 - Port Moresby Invasion Force

Rear Adm ABE Koso

tactical command

Tsugaru

Maj Gen HORII Tomitaro

Nankai Detachment

Asakasan Maru

Akibasan Maru

AP

no aircraft

Asakasan Maru

AP

no aircraft

Chaina Maru

AP

no aircraft

Chowa Maru

AP

no aircraft

Fumi Maru No. 2

MSM

no aircraft

Goyo Maru (1)

AOM

no aircraft

Goyo Maru (2)

AP

no aircraft

Hibi Maru

AP

no aircraft

Hoyo Maru

AOM

no aircraft

Matsue Maru

AP

no aircraft

Mito Maru

AP

no aircraft

Mogamigawa Maru

AP

no aircraft

Ojima

Repr

no aircraft

Seki Maru No. 3

MSM

no aircraft

Shoka Maru

AP

no aircraft

Taifuku Maru

AP

no aircraft

Tokiwa

ML

no aircraft

Tsugaru

ML

1 x E7K2

55 Infantry Corps HQ

Command

Asakasan Maru

144 Infantry Rgt

Infantry

Asakasan Maru, Azumasan Maru, Chaina Maru, Matsue Maru, Mito Maru

55 Cavalry Rgt, 3 Co

Cavalry

Hibi Maru

55 Engineer Rgt, 1 Co

Engineer

Taifuku Maru

47 Field AA Gun Bn, 1 Co

Anti-Aircraft

Mito Maru

Kure 3 SNLF

Marine

Akibasan Maru, Chowa Maru, Goyo Maru, Mogamigawa Maru, Shoka Maru

Task Force J5 - Port Moresby Invasion Close Cover Force

Rear Adm MARUMO Kuninori

18 Squadron

Tenryu

Kamikawa Maru

STM

6 x F1M2, 3 x E13A1

Keijo Maru

GBM

no aircraft

Nikkai Maru

GBM-MLM

no aircraft

Seikai Maru

GBM

no aircraft

Tatsuta

CL

no aircraft

Tenryu

CL

no aircraft

Task Force J6 - MO Distant Cover Force Main Body

Rear Adm GOTO Aritomo

Port Moresby Invasion Group, 6 Squadron

Aoba

Aoba

CA

1 (1) x E13A1/11

Furutaka

CA

1 (1) x E13A1/11

Kako

CA

1 (1) x E13A1/11

Kinugasa

CA

1 (1) x E13A1/11

Task Force J7 - MO Distant Cover Close Support Force

Shoho

CVL

12 x A6M2/21, 9 x B5N2/12

Sazanami

DD

no aircraft

Task Force J8 - Raiding Group

RO-33

SS

no aircraft

RO-34

SS

no aircraft

Task Force J9 - Patrol Group

I-22

SS Midget

1 x Type A Midget Sub

I-24

SS Midget

1 x Type A Midget Sub

I-29

SS Scout

1 x E14Y1/11

I-28 (optional unit)

SS Scout

1 x E14Y1/11

Task Force J10 - Austrailia Reconnaissance Unit

I-21

SS Scout

1 x E14Y1/11

Task Force J11 - South Seas Reconnaissance Unit

I-27

SS Scout

1 x E14Y1/11

Suport Forces

New Guinea-Solomon Sea

Patrol Planes

12

Japanese Controlled Locations

Gasmata
Kavieng
Lae
Rabaul
Salamaua
Shortlands

Allied Controlled Locations

Charters Towers
Cloncurry
Cooktown
Darwin
Efate
Horn Islands
Misima
Noumea
Port Moresby
Sydney
Townsville
Tulagi