I t.osJ CONFIDENTIJU.

. H!l~ARTERS NORTHERN TROOPS & LANDING FORCE

IN THE FIELD

30 July 1944

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From: AC of S, G-2. To :

SubJect:

Source:

All units concerned.

Captured Japanese Documents Relative to Defense Organization of TINIAN Island.

D-2, 4th MarDi v.

The following is the defensive plan of the WAstern Sector Force trans­lated from a document turned in by the 23rd Marines. The Western Sector Force was the 1st Bn 50th Inf. Rgt. It was compose~ of the foll~wing units: 1st Co., 2nd Co., 3rd Co., Infantry, Artillery Datachment, TAKA BUTAI, and the x .. BUTAI.

There is no clue as to the nature or size of the last two units. They both bear the names of their senior officer and the X-BUTAI is so-called because the characters of the name defy translation.

This order should be read in conJunction with the Garrison c.o., Col. OGATA's order of June 28, 1944 and translatecl. July 27 by D-2, 41th MarDiv. This order laid down the missions of the respective sector forces of which the 1st Bn, 50th Rgt. was one of three • .. -- ... ~ - - ~ . - - - --- -- - ~ - - ~ - - ~ - - - - - - - - - -

PLAN FOR THE GUIDANCE OF BATTLE July 7, 1944. Western Sector Force

I. We anticipate the following combat situations, and expect that the principles for the guidance 0f combat will bo in accorce~c~ with the several annexes.

A. Plan po. 1:

a) In case the enemy attacks TINIAN Harbor and the PEPENOMARU (TA 534) coast line simultaneously.

b) In case the enemy only attacks TINI.~ Harbor.

B. Plan No. 2: In case the enemy attacks the ASIGA Bay (Yellow Beachs) area.

c. Plan No. 3: In case the en amy attacka UNECHURO (White Beach 2),.

D. Plan No. 4: In case the enemy attacks TINI.AN and UNECHURO simultaneously.

E. Plan No. 5: In case the enemy attacks TINI.AN -I'Uld ASIGA Bay simultaneously.

II. In case of an attack. although we will devote our entire strength -- ~- - - -

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SubJect :

Source:

Captured J apanese Documents Relative to Defense Organi zation of TINIAN Island.

D-2, 4th MarDiv.

The following is the defensive plan of the WAstern Sector Force trans­lated from a document turned in by the 23rd Marines . The Western Sector Force was the lst Bn 50th Inf. Rgt. It was compose& of the foll~wing units: lst Co., 2nd Co., 3rd Co., Infantry, Artillery Detachment, T.AXA BUT AI, and the x ... BUTAI.

There is no clue as to the nature or size of the last two units. They both bear the names of their senior officer and the X-BUTAI is so-called because the characters of the name defy translation.

This order should be read in conjunction with the Garrison c.o., Col. OGATA's order of June 28, 1944 and translatecl July 27 by D-2, 4th MarDiv. This order laid down the missions of the respective sector forces of which the 1st Bn, 50th Rgt. was one of three • .. -- ... - - - - - - - - - - - - - - ~ - - ~ - - - -- --- ~ -

PLAN FOR THE GUIDANCE OF J3ATTLE July 7, 1944. Western Sector Force

I. We anticipate the following combat situations, and expect that the principles for the guidance 0f combat will be in accord~nce with the several. annexes.

A. Plan ~o. 1:

a) In case the enemy attacks TINIAN Harbor and the PEPENOM.ARU (TA 534) coast line simultaneously.

b) In case the enemy only attacks TINIAN Harbor.

B. Plan No. 2: In case the enemy attacks the ASIGA Bay (Yellow Beachs) area.

c. Plan No. 3: In case the enemy attacks UNECHURO (White :Beach 2),.

D. Plan No. 4: In case the enemy attacks TINI.AN nnd UNECHUBO simultaneously.

E. Plan No. 5: In case the enemy attacks TINiiiN Md ASIGA Ilay simultaneously.

II, In case of an attack , although we will devote our entire strength to destroying the enemy on the beach , teking tho several possibilities into consideration, we will move as foll6~e:

A. In case the enemy has already landed and occupied positions:

a. Plan No.1 (A & 13): We will hold the assembly area to the North of TINIAN Town

and prepare for a close quarters attack.

b. ·Plan No. 2: We will hole the ~xea to the East of HINODE Shrine (TA 628 H)

and prepare for a close quf'..rters attack.

c. Plalll No. 3: We will)hold the gun positions to the West of the No . 1 Air­

field (TA648) and to the Scuth of the main road which rune South of HAGUI Pond (TA 640 NS:X:) ann prepare for a close quarters attack,

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B. In such situations, the attack will be made by all hends at ~set, and the enemy will be driven into the sea by dawn.

c. In the avant that we are unable tc expel the enemy by dawn, we will defend a final line to the last man.

PL.AN !10. 1-a:

1. General. While striving with our entire force to destroy the enemy on the beach, we must be prepared to counterattack toward 'riNI.AN Town. (See Map 1).

2. Chart of strength to be employed by several units:

Unit # 1 co. I 3 Co.

T }J{A !JUT AI X-BUTAI

3. Counter-attack:

Strength Entire strength. Entire strength excepting 3d platoon to remain on beach. 2/3 of entire strength About 50 men will continue their present duties.

1. The 2nd Company, during the tine when the main strength of the Battalion has not yet arrived, will hold their present positions. The time for counterattack will be indicated to them separately.

2. Both right and left flanks of the 2nn Company and the lst CompBn¥1 s artillery battery will endeavor to destroy the enemy by directing hoavy fire against the beach. Should the enemy finally land. they will immediately alter th~ir positions and support the counter-attack.

3. The TAKA BUTAI will be responsible for protecting the flank and for occupying strong points for counter-attack in the direction of TINI.AN Town.

4. Deployment ano. Hovement: 1. The 1st Company will mcY& on the main road. 2. Bn Headquarters, 3rd Gonpany, and the T.AKA :BUTAI will

move along the road 800 meters East of the main road. 3. At night, although movement by vehicles will be the rule,

there will be times when we will movo on foot. During the d~, movement on foot will be soP.

Distributions

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Plan No. 2:

Regimental Headquaxters 1st Company 2nd Company 3rd company Infantry Artillery DetRChment X BUTAI T }J{A BUT .Al

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enemy on the beach, we must be prepared to counterattacK towarcl 'lT~J::IU'l ·row-:-.~----.­

{ See Map 1) . 2. Chart of strength to be employed by several units:

Unit Strength Entire strength. # 1 Co.

# 3 Co. Entire strength excepting 3d platoon to remain on beach.

T JJ{A !3UTAI X-BUTAI

2/3 of entire strength About 50 men will continue their present duties.

3. Counter-attack:

1. The 2nd Company, during the ti~e when the main strength of the Battalion has not yet arrived, will hold their present positions. The time for counterattack will be indicated to them separately.

2. Both right and left flanks of the 2nd Company and the 1st Company1 s artillery battery will endeavor to destroy the enemy by directing heavy fire against the beach. Should the enemy finally land, they will immediately alter th~ir positions and support the counter-attack.

3. The TAKA BUTAI will be responsible for protecting the flank and for occupying strong points for counter-attack in the direction of TINI.AN Town.

4. Deployment and 1-Iovement: 1. The 1st Company will mcve on the main road. 2. Bn Headquarters, )rd Company, And the TJ>X.A :BUTAI will

move along the road 800 meters East of the main road. 3. At night, although movement by vehicles will be the rule,

there \..rill be times when we will move on foot. !Uring the day, movement on foot will be SOP.

Distribution:

PL.AN NO • l-b 1

Regimental Headqu~rters 1st Company 2nd Company 3rd Company Infantry Artillery Detachment X BUTAl T .AKA BUT .Al

1. General: A part of the force will remain on the PEPENOMAW Coast Line (TA 534) for security. The main strength will counterattack in support of t~e 3rd Bn in such a manner as to harraes the ene~ 1 s flank and interfere with his lan~ing.

2. Principles of Counterattack: a. The 2nd Company will hold its present positions and protect

the rear from counterattack. b. A part of the forces of the TAKA BUTAl will occu~ strong

points on both flanks and its main force will attack from between them. c. The order in which units attack is shown on the map. d . Battalion Headquarters will move forward with the 2nd Company. e. The TAKA BUTAI will defen~ the strong points which it occupies

on the flanks to the East.

Plan No. 2:

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... - 1. General: ~ will attack on the enemy' s fle.1~ in support of the

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2nd Battalion. 2. Strength to be useo. by several units :

1st Company Entire strength 2nd Company Same as plan #3 3rd Company Same as plan #1 Inf . Artillery Detachment Same as plan #3 X BUTAI Same as plan #l T.AKA BUTAI Same as pian #1

3. Principles of counterattack will be indicated by circumstances. 4. Deployment and routes of movement :

}rd Co. and X DUTAl: HAGUI (TA 260 NSX) to HINODE Shrine (TA 628 H). Bn Headquarters : CHUBO (TA 625, 626, 618, 619) to Cliff Point to

West of Transmitting station (TA 605 U). 2nd Co., Inf. Art. Detachment, ru1d T.PJCA BUTAI:

KAHI (TA 590) to Cliff Point West of Transmitting Station.

Plan No. 3t

1. attack.

General: We will destroy the enemy during his landing by counter­( See Map). Strength to be used by several companies:

1st Company 2nd Company

Inf. Artillery Detachment T.AKA 13UTAI

Entire Strength Entire strength, excepting i platoon to be left at PEPENOMABU (TA 634) Entire Streneth. Same as Plan No. l .

2. Principles of counterattack. a. 3rd Company will hold its present positions as a reserve until

the main strength of the Battalion has completed its deployment. b. Direction and order of counterattack is sh~wn on the map. c. In case the enemy does not land in front of the X BUTAI, it will

leave a part of its forcee on the coast and counterattack as shown on the map. d. The lst Company initially will support the counterattack of

the T}J{A BUT AI and the 2nd Company.

3. Routes of Movement: a. Bn Headquarters , 1st and 2nd co : K.ABI to CHUBO (TA 625, 626,

6u~ • 619) by the·. )lant ation road to the East of the main road. b. TAKA RUT AI and the Inf . Artillery detachment: Main road and

the ro·nd to the West of it.

Plan No. 4: In case the enemy attacks TINIAN Town and UNECHURO (TN: White Beach 2)

simultaneously. 1. 3rd co. ro1d X TIUTAI will continue present functions. 2. Ilattal1on Heaclquarters, 1st Company and TAKA BUT AI will fight

according to Plan No. 1. Howev~r, there may be changes from the above order.

Plan No. 5. --- - - --~- - -

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3. Pr inciples of counterat tack will be indicated by circucistanoes. 4. Deployment ana routes of movement:

3rd co. an c. X :DUTAl: HAGUI ( TA 260 NSX) to HINO IE Shrine ( TA 628 H). Tin Headquarters: CHUBO (TA 625, 626, 618, 619) to Cliff Point to

West of Transmitting station (TA 605 U). 2nd Co., Inf . Art. Detachment, tmd TAKA BUTAI:

KAHI (TA 590} to Cliff roint West of Transmitting Station.

Plan No. 3:

1. attack.

General: We will nestroy the enemy during his landing by counter­( See Map). Strength to be used by several companies;

1st Company 2nrt. Company

Inf. Artillery Detachment TJJ{A :BUTAI

Entire Strength Entire strength, excepting i platoon to be left at PEPENOMABU (TA 634) Entire Strength. Same as Plan No. 1.

2. Principles of counterattack. a. }rd Company will holn its present positions as a reser~e until

the main strength of the Battalion has completed its deployment. b. Direction and order of counterattP£k is sh0wn on the map. c. In case the enemy does not land in front of the X BUTAl, it will

leave a part of its forcee on the coast and counterattack as shown on the map. d. The 1st Company initially will support the counterattack of

the T}J{A BUT AI and the 2nd Company.

3. Routes of Movement: a. Bn Headquarters, 1st and 2nd co: KAHI to CHUBO (TA 625, 626,

618, 619) by the·. )lenta.tion roan to the East of the main road. b. T}J{A :BUT AI and the Inf. Artillery detachment: Main road and

the ro·A.d to the West of it.

Plan No. 4: In case the enemy attacks TINI.AN Town ancl UNECHtrnO (TN: White Beach 2)

simultaneously. 1. 3rd co. ro1d X ~UTAI will continue present functions. 2. :Dattalion Headquarters, let Company and TAKA BUT AI will fight

according to Plan No. 1. Howev~r. there mey be changes from the above order,

Plan No. 5.

In case the enemy attacks ASIGA and TINI.AN Town simulteneously. units will move according to PlPn No. 1.

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Distribution: JICPOA -2 Com5thFlt -1 CTF 51 -1 CTF 52 -1 CTF 56 -1

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2cl MarDiv -5 4th MarDi v -5 27th Inf, ·:* • -5 24th Corpe Arty. -1 Is Com TINI.AN -1

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