- 85 - Pacific War - The battle of Kula Gulf, July 4-11, 1943

Last time we spoke about the amphibious assaults for Operations Chronicle and Toenails. General Douglas MacArthur finally performed his landings at Nassau Bay, Woodlark and Kiriwina islands. Woodlark and Kiriwina proved to be cake walks, while Nassau Bay proved a tougher nut to crack. Then over in the Solomons, Admiral Halsey unleashed his landings at Wickham Anchorage, Segi Point, Viru Harbor and Rendova. Now the Japanese were more alert to the invasions and offered some resistance, although ultimately Sasaki would order many forces to simply withdraw from the invaders. Admiral Kusaka tossed a ton of airpower at the incoming allies only to lose a disastrous quarter of his air fleet, forcing him to ask his Army colleague Immamura for additional support. However with all of these landings came a large amount of allied warships to bring them, and such actions could only bring about one conclusion, another naval battle for the pacific war.

This episode is the Battle of Kula Gulf 

Welcome to the Pacific War Podcast Week by Week, I am your dutiful host Craig Watson. But, before we start I want to also remind you this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Perhaps you want to learn more about world war two? Kings and Generals have an assortment of episodes on world war two and much more  so go give them a look over on Youtube. So please subscribe to Kings and Generals over at Youtube and to continue helping us produce this content please check out www.patreon.com/kingsandgenerals. If you are still hungry for some more history related content, over on my channel, the Pacific War Channel you can find a few videos all the way from the Opium Wars of the 1800’s until the end of the Pacific War in 1945. 

 

Before we jump into the naval battle of Kula Gulf a lot was occurring in New Guinea and the Solomons. Over in the Bobdubi front, the Australian 15th brigade under the temporary command of Colonel Guinn were preparing for the main offensive, hoping to trap the Japanese defending Mubo. To support the Nassau Bay landing, Colonel Guinn ordered the untested 58/59th battalion to advance upon the Japanese high ground position at the Old Vicker’s, Coconuts and Bobdubi area. They would be marching from Orodubi to the Coconuts while Major Warfe’s commandos would raid Malolo and Kela. Company A and C of the 58/59th would make the initial attack seeing A attacking Gwaibolom and C the Old Vicker’s position. Following close behind them was B company who were to advance across the ridge to gain control over the Bench Cut Track. D Company were to be held in reserve at the Kunda-vine. On June 26th, A company set off from Missim heading towards their forming up point at Namling. On the 28th, the other remaining companies made departed Meares Camp heading for the New Bobdubi kunda bridge. The next day 17 of Warfe’s commandos were ambushed by 30 Japanese. They managed to escape, but were forced to abandon a Bren gun. By the night of June 29th, the 58th/59th crossed the Francisco River and began preparations for the launch of the main attack which would occur the next morning. The next morning saw lackluster allied air strikes against Gwaibolom, Salamua, Old Vickers and the Coconut area. Companies B and C left their start up point of Uliap Creek, seeing C attack Buggert village, just a bit south of the Old Vickers position being held at this time by a company of the 115th regiment led by Lt Ogawa Takeshi. They successfully outlanked the Japanese and captured the village, suffering only 2 casualties for their efforts. From there the Australians assaulted the Old Vickers position, but the Japanese defenders repealed them right back to Buggert village. The Japanese defenders had well established positions, hiding in dugouts 40 feet down from the top. The failure to seize the Old Vickers position, prevented B Company from reaching their objective, the Bench Cut Track and now they were being met with Mortar fire as they crossed the ridge.

Meanwhile A Company began their assault on Orodubi, but anticipating booby-traps the men had left on the Bench Cut Track around 70 yards south of Orodubi, they chose to climb a 40 foot kunai slope to join the main track just 10 yards within the enemy. Around 80 men of Company 10 led by Lt Gunji Toshio saw the Australians doing this and promptly began tossing grenades at close range and fired down upon them. The Australians were forced to flee back to Namling as a result. The next day it was decided they would use a platoon to contain Orodubi while the others bypassed it to go onwards and capture Gwaibolom and Erskine Creek, which they managed to do by July 2nd. While this was occurring, B Company was trying to find another way across the ridge, but were failing to do so. So on July 2nd, they were ordered to move across the ridge via the newly established positions at Gwaibolom and Erskine Creek, and would reach the Komiatum Track / bench track junction where they would prepare an ambush by the 3rd. At around 5pm on the 3rd, B company managed to ambush a party of 20 Japanese trying to move towards Old Vickers and this quickly fell into hand to hand combat killing half the Japanese and one of their officers.

Meanwhile Colonel MacKechnie’s men were fighting to keep their beachhead alive at Nassau Bay. AA and C Companies had fought through the night against Japanese until their 300 yard perimeter was secured. At dawn on June 30th, C company began advancing south to find the Papuan infantry battalion who were around Cape Dinga. C Company made their way to a place just due west of Cape Dinga, following the Tabali River, while A Company was patrolling north and south of an arm of the Bitoi river where they ran into the 3rd battalion, 102nd regiment. A Company backed by some other units attempted to hit the Japanese western flank, but they were overwhelmed and forced to turn back. It would actually be Amphibian engineers who would save the day, who came in at the last minute to help A company out just as the Japanese tossed a banzai charge at them. Upon receiving word of the Japanese attacks, C company rushed over to join A by 3pm. Yet unbeknownst to them, the Japanese were not actually trying to break through, they were trying to withdraw by crossing the Tabali river. General Nakano had ordered them to withdraw to a new position at Lake Salus when he heard word over 1000 men had landed at Nassau Bay. Nakano also had ordered the 3rd battalion of the 66th regiment to send 150 men to march south from Salamua to help out in the Nassau Bay area. These men were tasked with carrying out only limited attacks against the allied forces around Nassau Bay, such as delaying actions to help the Nassau Bay garrison withdraw towards Lake Salus. Nakano was also coordinating with Colonel Araki who was now operating out of an HQ in Mubo, he had likewise brought forces over to Mubo from Salamua. 

As for the Papuan infantry, they were marching north and they ran into the 3rd battalion, 102nd regiment around Cape Dinga as well. They managed to attack their rear killing at least 26 Japanese who were holding out in a bunker. After this they continued their march to the Nassau Bay beachhead.

At around 4:30pm C company began sending reports that they were seeing some Japanese crossing over the Tabali River just south of their position. They were ordered to return to the beachhead perimeter to take the southern flank, but before they were able the Japanese attacked their rear taking 5 men and a platoon commander.

Around the beachhead a hastily prepared defensive line was established by an ad hoc force of Engineers, Australian infantry and Headquarters personnel. As the night fell on, C company reached the southern part of the perimeter, quickly taking up positions. The Japanese began a series of attacks throughout the entire night from all sides using machine guns, grenades, mortar and rifle fire. Smaller parties of Japanese were trying to infiltrate positions. It was a terrifying experience for the defenders who would dub it “guy fawkes night”. Many of the men had itchy fingers which led to tragic accidental casualties throughout the night. It was a pitch black night and the noises of the jungle and Japanese screaming stuff in english unnerved the allied forces. The Japanese had tossed a ton of stuff into the perimeter trying to get the allies to use up their own munitions in response. As a result the allied forces had 18 deaths and 27 wounded several of which were the result of friendly fire. The Japanese it seems to have around 50 deaths during the night.

Back over in the north, on June 30th, Captain Dexter was leading forward a number of patrols in preparation for an assault upon Duali. However as they advanced they ran into a Japanese ambush along the Bitoi track, thus canceling their planned assault. The next day, Brigadier Moten ordered Dexter’s exhausted men to move forward regardless. With some support of Beaufighters strafing the Japanese positions, the Australians charged straight through the enemy positions, and to their shock they found them abandoned. As Dexter recalled ‘We advanced through the Japanese position with fixed bayonets and searched the scrub on each side. Everywhere was evidence of a hasty evacuation, dropped equipment and personal rice bags, and evidence of extensive bomb damage. But of the Japs, no sign.’ Thus Dexter and his men captured the mouth of the Bitoi by early afternoon.

Shortly after the capture, Dexter made contact with MacKechnie who was busy expanding his perimeter northwards. By nightfall, PT boats led by Lt Commander Barry Atkins covered the landing of 11 landing craft full of reinforcements. The PT boats staffed nearby villages to cause a lot of ruckus, hoping to dissuade nearby Japanese from firing on the vulnerable landing craft. The reinforcements were mostly from B company who had failed to land during the third wave. On July 2nd, Moten began to pressure MacKechnie, stating he had to get his troops moving inland at once. Thus MacKechnie decided to leave C company to defend the perimeter while Lt Colonel Harold Taylor would lead the rest of the men towards Napier. Luckily for the men, 4 75mm pack howitzer m1 artillery guns had been unloaded that night with the reinforcements giving them ample firepower. The gun were positioned on the beach and immediately went to work shelling targets at the mouth of the Tabali River, Cape Dinga and the area between Duali and the Bito River’s southern arm.

On July the 3rd, the men now designated the Taylor Force accompanied by Dexter’s company were marching for Napier, but their march was a slow one as the jungles were thick and they were carrying heavy equipment. While this was occurring the 3rd battalions of the 102nd and 66th regiments were consolidating around Lake Salus looking to create a defensive position. The coastal area however proved to be too difficult to fortify, so they moved over the Tambu where they joined a SNLF platoon of the 5th Sasebo to make a position there.

At this point General Savige decided to send the Papuans north along the coast to keep pressuring the enemy’s retreat. By the 4th, Taylor Force had taken a position at Napier and were now under the direct command of Moten’s 17th brigade. Back over on the beaches at Nassau Bay a total of 1477 troops had been landed, thus securing the beachhead. Dexters company marched back over to Guadagasal taking a coastal route, getting themselves ready for a future assault against Mubo slated for July 7th. MacKechnie believed the loss of some of his landing craft had greatly delayed the entire operation, perhaps up to 3 weeks. He did not think he would be able to move artillery or large quantities of supplies further inland. He also did not think it was tactically sound to leave his base, as the Japanese proved to be quite a nuisance in the area. Orders from the top were demanding a artillery road be built, but his troops at the assembly area would probably run out of rations in a day or two and he had no native carriers on hand. In his words "To be very frank we have been in a very precarious position down here for several days and my sending the rifle troops inland was contrary to my own best judgment. Troops had gone inland stripped to the bone. Without heavy weapons and mortar and machine-gun ammunition. "Therefore, these troops who are up there now are in no position to embark upon an offensive mission until we are able to get food, ammunition and additional weapons up to them." In response to the situation, on July 6th, Moten ordered 1000 rations and 100 boy loads of ammunition…god you have to love the australians, boy-loads haha. Anyways this was to be dropped over Napier.

Moving over to the Solomons, Admiral Halsey had successfully occupied Rendova, Segi point, Viru Harbor and Wickham anchorage forcing the smaller number of Japanese to withdraw to their main base at Munda. Admiral Kusaka tossed a series of air strikes against the invaders, suffering horrible losses whereupon he had to request General Immamura reinforce him with the 21st air flotilla at Saipan and from the 6th air division.

For the battle of Munda, Admiral Halsey had assembled the largest air force ever assembled in the Solomon islands campaign. It was a force that was needed as the Japanese in Rabaul tossed every bomber that was available to try and thwart the US amphibious invasion. The June air battles had greatly depleted the Japanese air power, but they were not done. On July 1st the Japanese hit Kahili using 6 Vals and 34 Zeros. They were trying to knock out the 3rd battalion, 103rd infantry who were unloading at Poko plantation on the west coast of Rendova. However they were met by 20 P-40’s and F4Fs that ripped them to pieces taking down 3 Vals, 5 Zeros and losing 5 P-40’s in the process. Although the allies were scoring massively high success against the Japanese in ratios, by this point it reached 7 to 1, they were still unable to sustain round the clock 32 fighter or more CAP. To do this required a total of 96 operational aircraft and after 10 days of fighting in the skies over New Georgia the pilots were also becoming increasingly exhausted. Colonel Merrill Twining requested more P-38 Lightnings, the aircraft that had become the most comfortable fighter to those in the south pacific by this point. But Hap’s Arnold over in Washington was heavily committing forces for General Patton and Montgomery’s invasion of Sicily at the time so he had to deny this request. As Arnold stated back “every trained unit must be thrown against the German until he is beaten”. 

Regardless, with Rendova secured, General Hester was landing the bulk of his forces for the final push against Munda. The unloading process had been heavily hampered by poor planning and a failure to allocate adequate personnel for beach control and unloading duties however. To clear the new beachhead and distribute the combat stores, infantrymen were detailed to carry out the work. When transports carrying the next echelon arrived, many of the boats grounded offshore and had to be unloaded manually by troops wading ashore. On July 2nd, Admiral Kusaka coordinating with General Itahana formed a combined strike led by Major Endo Misao consisting of 18 Ki-21 bombers, 23 Ki-43’s and Ki-61s with 29 Zero escort. Unfortunately for the allies, Admiral Mitscher had recalled the Rendova patrol due to bad weather, so a total of 18 Ki-21 bombers came to the scene unmolested and hit the congested area around the harbor. The strike caused 200 or so casualties, mostly upon the 2nd battalion, 172nd, the 24th seabees, the 9th defense battalion and staff officers of various headquarters. The strike also knocked out a lot of equipment and supplies.

With the failure of the June air battles to hold back the allied invasion, Admiral Koga turned to the Navy for the task of providing new supplies to the defenders at Munda Point. The Tokyo Express was back in business, a convoy of 10 destroyers were sent to New Gerogia led by Rear Teruo Akiyama aboard his flagship Niizuki. His force was ordered to attack Rendova and he had with him the old Yubari, Yunagi, Mikazuki who would operate south of the Treasuries as a diversion, while Niizuki, Amagiri, Hatsuyuki, Nagatsuki, Satsuki, Mikazuki and Mochizuki would hit the allied shipping and shell the harbor. The Japanese destroyers were spotted right away, but bad weather prevented 3 American strike forces consisting of PBY’s and B-25’s from hitting the incoming enemy. In the meantime, Akiyama closed in on the southern tip of Rendova. She circled the island and opened fire on a point due west of the harbor. The bombardment was quite ineffective, but some allied PT boats rushed in to attack her which caused a wild 10 minute mini battle seeing 2 of them running aground.

On the ground, General Hester ordered the 1st battalion, 172nd regiment and A company of the 169th regiment now designated Southern Landing Group to land at Zanana beach. Led by General Wing on the afternoon of the 2nd they made a crossing over Blanche Channel using 16 landing crafts. With the support of Brigadier General Harold Barkers artillery they successfully formed a perimeter. Now the Japanese air and naval attacks were worrying Halsey. He expected the Japanese to launch a major counterlanding with substantial forces perhaps on the 3rd. Therefore he ordered Admiral Ainsworth to lay in wait off the west coast of Rendova for the enemy. However July the 3rd would not bring an enemy, this was because General Imamura and Admiral Kusaka agreed with the lack of air and naval forces on hand at this time they could not perform such a feat, to the disgust of General Sasaki who had assumed command over the defense for Munda on the 2nd. Sasaki was so adamant about landing reinforcements at around midnight on July 3rd he proposed violating orders to simply make a counter landing using the 13th regiment and Ota’s barges. He had a crazy idea to simply bring the vessels in and mix them with the American landing craft who were making rountrips to the mainland through the Honiavasa passage. He thought even if half his forces perished, the attack would be worth it. Ota objected to this on the grounds the barges would be needed for other transports scheduled for July 4th and 5th, apparently this made Sasaki visibly upset, who adjourned the meeting and left the room. Ota pushed Sasaki to write his plans down and submit them to Rabaul, which he did, and Rabaul squashed it immediately. 

On July 3rd the Japanese performed an unsuccessful fighter sweep over Rendova and the next day reconnaissance reported the island was secured by the Americans who had heavily reinforced it with anti aircraft guns and radar. They also reported landings on Zanana and that it looked like Rice Anchorage would be next, thus cutting off Japanese reinforcements from coming down the Munda trail from Bairoko. Imamura and Kusaka had to wait for an accumulation of forces to bring reinforcements to New Georgia; they had no intention of losing it like Guadalcanal. 4000 soldiers of the 13th and 45th regiments were earmarked for departure. Kusaka ordered Itahana to launch another combined strike, this time aimed at Roviana island. However the Japanese were intercepted by 32 F4F’s causing the loss of 6 Ki-21s, 3 Ki-43’s and a zero without a single loss for the Americans. This would be the fateful end of the joint air operations as Itahana needed to take his forces to help the Salamaua area. Luckily for Kusaka he received reinforcements in the form of the 201st Kokutai from the 25th flotilla which would allow him to gradually rebuild his air strength by mid july.

Meanwhile Admiral Turner had assigned 7 destroyer transports, 2 fast minesweepers and 4 Destroyers to carry the 1st raider battalion, the 3rd battalion, 145th infantry regiment and the 3rd battalion, 148th infantry regiment of the 37th division led by Colonel Liversedge into the Kula Gulf. Their escort cover was Ainsworth task group 36.1 consisting of the Cruisers Honolulu, St Louis, Helena and destroyers Nicholas, O’Bannon, Strong and Chevalier. They were also tasked with bombarding Vila and Bairoko. On July 4th, Ainsworth led the group up the slot while the Rear Admiral Teruo Akiyama’s Tokyo Express were on their way to Vila carrying 1300 troops of the 13th regiment towards Vila.

At around midnight Ainsworth entered Kula Gulf carefully avoiding the mindfield laid back in May. His force proceeded to shell Vila, but they failed to detect the Japanese who were heading south. The Japanese detected the Americans at 12:15 thanks to their brand new radar system; the 1-shiki 2-go radar which was outfitted on the Niizuki. The IJN were eager to test out the radar so they fastened it to the flagship of Destroyer squadron 3. Oh how the turn tables as they say. The radar indicated they were heavily outnumbered, so Akiyama decided to abort the mission, but before doing so he ordered 14 torpedoes to be launched at a range of 10 miles. The type 93 long lance torpedo remained the best weapons of the kind in the Pacific theater and one his destroyer Strong at 12:43 practically cutting her in two. Can’t stress it enough what an immense advantage Japan had over the Americans in terms of torpedo power during the first half of the war, hell if any of you play World of Warships, you know Japanese DD is base as hell. 

When the torpedo hit, the Japanese were already heading back up the Slot and Ainsworth thought he was being attacked by IJN submarines. Thus while Liversedge’s men were landing on the southside of the Pundokono River, Ainsworth dispatched destroyers O’Bannon and Chevalier to rescue the survivors of Strong. The Strong was settling fast off the Enogai inlet. When Chevalier and O’Bannon came to the scene picking up survivors a gun duel emerged between them and some batteries on Enogai. By 1:22am Chevalier had 239 men come aboard before her commander said it was time to go. His ship was getting battered by the batteries and he unfortunately was forced to ram the Strong to keep it from capsizing which ripped a 10 foot fash in Chevaliers bow. A near miss from one of Enogai’s guns had opened her seams aft and another shell knocked out her NO 3 gun mount. When Chevalier was pulling away from the Strong, breaking her in two in the process, 3 of Strong’s depth charges went off under Chevalier lifted the entire boat out of the water causing her to flood in forward sections, talk about bad luck.

Over in Rice Anchorage, despite the terrible stormy weather and some gunfire from Enogai, Turner ordered the transport group to clear the Gulf by 7am so they could quickly unload their cargo. 300 men of the 148th regiment landed further north at Kobukobu inlet because of the terrible weather. It would take them until July 7th to meet up with the main body. Though the USS Strong had been sunk, the Tokyo Express failed her run, thus Akiyama elected to bring the bulk of his shipment to Vila the following night, but this time he brought 10 destroyers; Niizuki, Suzukaze, Tanikaze, Mocizuki, Mikazuki, Hamakaze, Amagiri, Hacujuki, Nagacuki and Sacuki. Halsey got advance word of this and ordered Ainsworth to return to Kula Gulf to wait for the Japanese to show up. Halsey also reinforced him with destroyers Jenkins and Radford. Ainsworth went into this with a simple but ultimately flawed plan. He overestimated the capabilities of radar guided 6 inch guns against fast moving targets. On top of that he seemed to be totally ignorant of the IJN’s Type 93 Long Lance torpedo’s capabilities. His plan was to wait passively until radar detected the enemy than he would toss his cruisers at the enemy using their 6 inch guns, hoping to fire over 8,000 yards or so. He believed that was the effective Japanese torpedo range, why he believed this I do not know. For his destroyers, they would launch torpedoes at the enemy.

 

Akiyama’s Tokyo Express departed Buin after sundown divided into a covering force of 3 destroyers in the front and the main bulk behind them. Around midnight on July 6th, Ainsworth’s force were just northwest off New Georgia, entering the mouth of the Kula Gulf. The Japanese were also arriving to the Kula Gulf whereupon they detached the first transport unit to land 1600 troops. By 1:06am, Niizuki’s radar detected Ainsworth’s force, but this time Akiyama was prepared for a fight. Akiyama detached his second transport unit at 1:43am and 7 minutes later American radar picked up the Japanese. Ainsworth took his force in closer until the enemy was 7000 yards away. Then at 1:56am at around a range of 6800 yards the Americans Cruisers began to open fire. Akiyama quickly recalled the second transport unit before he engaged the enemy. Unluckily for Akiyama the Americans concentrated their fire upon the Niizuki which was pulverized quickly. She became a burning wreck before she was sunk by 6 inch shell fire taking Rear Admiral Akiyama’s life alongside 300 sailors. Within 20 minutes the Americans would fire 612 shells, 6 of which smashed the Niizuki.

 

Despite the loss of of their commander, the well drilled torpedo crews pulled off a salvo of 16 torpedoes at the American gun flashes. Ainsworth ignorant of the long lance range could do little to avoid it. The light cruiser USS Helena was the first to be struck, her bow was blown off virtually up to the number 2 turret, nearly cracking her in two as she sank taking 190 of her 1177 crew with her. St Louis was hit by a torpedo that fortunately did not detonate and another nearly missed Honolulu. The Japanese fled as fast as they could for Buin as Ainsworth directed his two remaining cruisers to shell the second transport unit. Of the four destroyers in this group, Amagiri escaped with minor damage, while Hatsuyuki was hit by 2 6inch shells, but luckily for her they were duds and she limped away. Nagatsuki was hit by a single 6 inch shell to her rear ship which would force her to run aground near Bambari Harbor. The next morning she would be destroyed by American aircraft.

At 3:30am, Ainsworth ordered his forces to return to Tulagi as he dispatched the Radford and O’Bannon to pick up survivors while Nicholas chased the fleeing Japanese. The Japanese dispatched Amagiri to pick up their survivors and she would be intercepted by Nicholas taking 4 hits before she made her retreat. While this was going on the First transport unit completed unloading its 1600 troops and bolted through the Blackett Strait and Kula Gulf. The Japanese had managed to land their reinforcements and sunk the USS Strong and Helena, so they considered it a tactical victory, though the loss of the Niizuki and her commander was terrible. The battle for New Georgia was nowhere near done.

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The landings and early offensives were well on their way on New Georgia and the drive upon Lae was closing in. The Battle of Kula Gulf gave the Americans a bloody nose and now the Japanese had more forces at their disposal to try and dislodge the Americans from New Georgia.