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US Marine Corps - The Black Vault

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Planning for Paring the ~apanese Toenaih 491<br />

JAPANESE ORGANIZATION FOR DEFENSE OF BISMARCK BARRIER<br />

I<br />

EIGHTH AREA<br />

I<br />

I<br />

IMPERIAL GENERAL HEADQUARTERS<br />

Army Chain of Command<br />

1<br />

I<br />

Naval Chain of Command<br />

I<br />

I<br />

COMBINED FLEET<br />

I<br />

I SOUTHEASTERN FLEET<br />

K<strong>US</strong>AKA, RABAUL<br />

ARMY COMMANDS 17th ARMY<br />

AT<br />

NEW BRITAIN<br />

NEW GUINEA<br />

SHORTLANDS<br />

I r I<br />

I<br />

I<br />

MADANG<br />

ARMY<br />

8th FLEET llth AIR FLEET<br />

AIR OIVISION<br />

6th DIVISION MI KAWA K<strong>US</strong>AKA<br />

BOUGAINVILLEA SHORTLANDS RABAU L<br />

I 1<br />

1 I 1 I<br />

ARMY<br />

SOUTHEASTERN<br />

DETACHMENT<br />

New Georgia<br />

Sasaki<br />

8th COMBINED<br />

SN LF<br />

New Georgia<br />

Ota<br />

7th COMBINED<br />

SNLF<br />

Santa Isabel<br />

1<br />

BASE<br />

FORCES<br />

It would appear that the United States forces had a real command advan-<br />

tage in seeking to break through to the Bismarck Barrier over the Japanese<br />

seeking to defend its approaches, since one military officer, General Mac-<br />

Arthur, who was actually in the area of operations, had over-all strategic<br />

control, and could time the movements of his subordinates in the two-pronged<br />

offensive.<br />

<strong>The</strong> Japanese commanders, being on the strategic defensive, naturally<br />

had to react individually depending on the time and place they were attacked.<br />

But there was no Japanese area commander whose primary duty included the<br />

concentration of reserve forces prior to attack, and shifting these forces as the<br />

enemy attack developed.<br />

JAPANESE DEFENSE PREPARATIONS<br />

<strong>The</strong> New Georgia Group lay on the direct route from Guadalcanal to<br />

Rabaul, and had two good air bases, so the Japanese assigned to this group<br />

about 70 percent of their defensive troop strength available in the Central

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