Last time we spoke about the operations HA-GO, U-GO and the continued drive against Shaggy ridge. Lt General Mutaguchi Renya sought to invade India and was continuously scheming to drag the rest of the IJA on this rather insane endeavor. Yet the allies also tossed their own operations in the Burma theater greatly disrupting the Japanese planners and achieving numerous objectives. Over in New Guinea, Vasey launched an offensive against the Kankeiri saddle, designated operation cutthroat. Meanwhile General Nakano 's men were in a dire situation with the allied seizure of Sio and Saidor. Multiple Japanese units found themselves all doing the same thing, retreating further north. It seemed no matter what defensive lines they established, the allies kept their advance over land and periodically amphibious assaults their flanks and rear. The formidable defenses region of Shaggy ridge was not going to hold up against the allied advance much longer.

This episode is The Fall of Shaggy Ridge

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.

The Australian advance overland and Saidor operation had paid great dividends over and above the establishment of forward military base construction. The allies had formed a giant wedge between a significant residue of the Japanese fleeing the Finschhafen area. General Adachi commanding the 18th area army was facing a nightmare. Prior to the American landing, he had visited the 51st division HQ at Kiari and then traveled overland to the 20th Division over at Sio. He was fully aware of the hardships facing both forces. Meanwhile news of the Saidor landings hit Rabaul creating a massive debate. Senior officers sought to bring over all available troops to try and retake the town. Others sought to save as many troops as possible for a defense of Wewak, considering it the next main allies target. General Imamura favored bypassing Saidor altogether and withdrawing over inland trails. Thus Adachi appointed General Nakano to take charge of the withdrawal to Madang, and ordered 8 other companies to cross the Ramu valley to Bogadjim to harass the Americans at Saidor. These were purely defensive maneuvers. The Japanese also faced the daunting task of how to evacuate large numbers of troops from the 20th and 51st divisions from the impending allied trap. Nakano took the lead getting the 20th to retreat up the coast while the 51st worked their war over the inland trails. Nakano would soon be forced to abandon the plans and ordered both to pull into the interior to retreat towards Madang, nearly 200 miles away. This would mean the exhausted, starving and sick Japanese had to battle through the jungles, ridges, rivers and other horrors of the Finisterre range.

Meanwhile Saidor was easily secured by the 32nd division, the Australian 7th division advanced through the Ramu Valley and came face to face with Shaggy Ridge. Shaggy ridge had been transformed into a heavy fortified position with numerous nasty features such as the Kankeiri saddle, Pimple, Intermediate snipers pimple, Green snipers pimple, Prothero 1 and 2 and so forth. During the first weeks of January the Australians made very little headway against the honeycombed Japanese defenses. Their air forces were called in numerous times to plaster the ridgelines in a 3 day assault designated Operation Cutthroat. On the 18th of January, B-25s from Nadzab and Port Moresby would drop 500 lb bombs all over the defenses. On the 21st P-40s strafed and bombed the area and this was met with some reorganizing of the ground forces. The 15th and 18th brigades relieved the exhausted 21st and 25th. Brigadier F. O Chilton began the new job by opening heavy artillery up on Prothero I. Captain T. L James with the 2/2 pioneer battalion described the attack on January 20th “At 1000 hours we met 2/12 Infantry Battalion at the appointed rendezvous, where I met their CO., Lt.-CoI. C. F. Bourne. We did not stay long at the rendezvous but formed up and commenced the long approach march. It was a gruelling day. The long single file moved silently up the deep ravines, scaling cliff-faces with the aid of ropes and lawyer vines. It took us the entire day to cover the four mile approach. In one spot that was almost impossible to traverse—a steep-sided cliff—they rigged lawyer vines between trees to act as a handrail and allow us to pull ourselves up." Despite the harsh conditions and fierce resistance, the Australians got atop Canning saddle and then forded the Mene river and drew near the village.

Colonel Matsumoto’s men were now trapped between the 2/9th battalion advancing from the Pimple and the 2/12th battalion from Prothero 1. To the east there was the 2/10th battalion about a mile away from the main Japanese defensive position along the Kankeiri saddle. On the 22nd, the 2/12th dispatched D company who advanced between Prothero1 and Prothero 2. At 10:40am they began to fire their artillery upon Prothero 2 and at 11:15am a platoon tried to progress but was held down by Japanese snipers and machine gun fire. A company came through D company to advance along Shaggy ridge until 3:30 pm once they took were held down by Japanese fire. Then a single australian section rushed forward led by Bren gunner Private Bugg. His team hit a Japanese machine gun crew from just 30 yards away. He seized a toehold quickly upon Prothero 2. After some bitter fighting Prothero 2 had fallen into allied hands. Meanwhile to the south the 2/9th sent a patrol out on the 22nd who found pill-boxes at McCaughey’s knoll occupied with Japanese gunners. At 10:45am as allied artillery hit Prothero 2, Captain Taylor led a company of the 2/9th and assaulted McCaughers knoll. They were quickly pinned down, but by 1:15pm word reached them that Prothero 2 was captured and that the entire battalion was to push along Shaggy ridge. During that afternoon Taylor took his company to the western side of Shaggy ridge, getting ready for a new flanking maneuver against McCaughey’s knoll. The men fought their way up the knoll cleaning up pillbox one after another, capturing McCaugheys knoll by nightfall. It would cost them 8 men wounded.

More than 100 dead Japanese were found over the Prothero-Shaggry ridge area when mop up crews did their work. Meanwhile 2/10th kept up the pressure in the east. On the 22nd A Company led by Lt Gunn seized a foothold on Faria Ridge and, prompting the enemy by late in the afternoon, to abandon Cam's Hill, which was occupied by the 2/10th by 5.20 p.m. During the night and early morning of january 23rd, two counter attacks were launched by the Japanese.  At 2.40 the forward troops of A Company on the ridge were attacked from the south but the attack was repulsed with no casualties. After this the Australians moved down the track towards Kankeiri. Captain Haupt’s B Company of the 2/12th advanced down the track from Prothero 2. By 6pm they were atop the saddle around Crater Hill when they came across a Japanese gun position containing 150 rounds of 75mm ammunition. Half an hour later they ran into some resistance from slopes atop Crater Hill. They would pull back to the Kankeiri saddle to dig in for the night.

The 2/10th then dispatch D company led by Captain Kumnick to advance along the Faria Ridge. They made it 1500 yards before running into a well entrenched position that held them down with machine gun fire. During the night however the Japanese abandoned their entrenchments for Cam Hill allowing the 2/10th to establish itself in a position roughy 1200 yards southeast of Crater Hill the next day. On the 24th, the 2/9th took over the responsibility for Shaggy Ridge up to Prothero 2 allowing the 2/12 to advance up Kankeiri.  Small patrols from company B of the 2/12th reached the top of Crater Hill that day finding an enemy position on the southern slopes. On the 25th, the 2/12th and 2/10th probed enemy defenses on all sides of Crater Hill looking for decent approaches to attack. This led to several skirmishes, seeing both sides suffer casualties. One patrol led by Lt Coles of the 2/2nd pioneers, surveyed the Paipa mule track along the valley of the Mindjim, firing upon small bands of retreating Japanese. The Australians gradually converged to attack Crater Hill, but Matsumoto’s defenders put up a valiant effort to repel the assaults.

On the 26, Brigadier Chilton ordered Companies C and D of the 2/9th and Companies C and B of the 2/12th to assault Crater Hill. This saw companies C and D of the 2/9th perform a outflanking maneuver to the north tip of the Mindjim valley to hit the enemy's right flank, while Companies C and B of the 2/12th held the enemy down. Captain A. Marshall's C company led off at 10.35 a.m, passing from Shaggy Ridge through Kankirei Saddle and then to the north, with Captain Taylor's D company following to provide flank protection. By midday Marshall reported that he had advanced some 600 yards and passed through several old and abandoned positions finding no enemy. Cautiously he pushed on, at 5 p.m. he reached the summit of 4100. The main enemy position was to the south between Marshall and the 2/10th and 2/12th Battalions. Leaving Taylor to occupy the summit of 4100 Marshall advanced south towards Crater Hill in an attempt to surprise the enemy from the rear . He met them about 300 yards south-east from the summit just at dusk. The leading platoon attacked along the usual razor-back but withdrew because of heavy machine-gun fire. At 7 p.m. Marshall sent Lieutenant White's platoon round the right flank but approach from this flank was also very difficult and White was killed. By the nighttime, they had successfully surrounded Matsumoto’s weakened defenders.

Matsumoto’s defenders had established extremely formidable positions and had a large number of automatic weapons at their disposal. Matsumoto was ready alongside his men to make a final stand. Basically a siege of Crater Hill began and would only end after 5 brutal days. The first two days saw Chilton order the 2/9th take responsibility for the southern slopes of 4100 and Kankeiri saddle, while the 2/12th held Protheros and Shaggy ridge, and the 2/10th maintained pressure on the south-eastern slopes of Crater Hill. Skirmishes borke out everywhere, as the artillery smashed Crater Hill. Captain Whyte of the 2/4th field regiment fired 2000 shells, shattering trees, which unfortunately created more timber obstacles for the advancing Australians. At 9.30 a.m. on the 29th, 19 Kittyhawks dive-bombed Crater Hill, followed by ten minutes of artillery fire. At 1.30 p.m. the artillery laid down a barrage and machine-gun fire covered an assault on Crater Hill from the west by Captain Daunt's company of the 2/9th . The leading platoon attempted to rush the enemy position up a very steep and open slope but the Japanese, entrenched on a razor-back, were too strong and drove them back. The Australians also had the bad luck to be shelled by their own artillery. Each time they performed an assault, the stubborn Japanese held firm. Finally on the 30th with the help of some heavy rain Matsumoto decided to evacuate during the night. Matsumoto and the remnants of his force withdrew towards Yokopi and Kubenau valley. After dawn on the 31st, Australian patrols found Crater Hill abandoned and it was a horror show. They found a ghastly mess. At least 14 dead were found and evidence of burials alongside them. The 2/9th and 2/10th advanced occupying the hill on February 1st.

With that, Shaggy Ridge and the Kankeiri saddle had finally fallen. Chilton sent out patrols to pursue the retreating Japanese and perform mop up operations. By February 6th his forces managed to seize Paipa and Amuson. The Australians had suffered 46 deaths, 147 wounded while the Japanese figures were estimated at around 500 casualties. Meanwhile, Brigadier Hammer had also carried out two operations during this time period. The first was a diversionary attack against the Spendlove Spur held by elements of the 5th company, 80th regiment. This was carried out by Captain Kennedy company of the 24th battalion, whom managed to surprise the Japanese and quickly seized Cameron’s Knoll. On January 30th, the 57/60th battalion led by Lt Colonel Robert Marston departed Ketoba and along another company led by Captain McIntosh assaulted Orgoruna, Kesa and Koba. The Australians would find Orgoruna and Kesa undefended..

Lt Marston ordered Major Barker 's 8 company to patrol Koba, and they would enter Koba on  February 1st finding nothing, so they  pushed on towards Mataloi 2 . There were signs of very recent occupation and, 200 yards along the track , they were ambushed. Barker brought heavy fire down upon the Japanese ambush position and managed to capture Koba that night. On the morning of the 3rd, about 400 yards east of Koba, Barker again struck a Japanese ambush position. They quickly outflanked the enemy who withdrew through Mataloi 2 towards Mataloi 1 . By the time Mataloi 2 was occupied at 6.30 p.m., there was not enough time to hit Mataloi 1 nor to allow adequate consolidation of Mataloi 2 before dark. At 9.30 p.m. the Japanese counter-attacked from the direction of Matalo 1, commencing the assault with a heavy mortar bombardment. As Mataloi 2 could be defended from three sides, Barker decided that he could hold the area best from high ground to the south which would also be out of range of the enemy mortars. Accordingly he ordered a withdrawal and departed with his headquarters and one platoon. Apparently the orders did not reach the other platoons who were encircled while the remainder of the company was withdrawing to Koba. Long-range enemy machine-gun fire was directed at Kesa at the same time as the counterattack developed at Mataloi 2. The 57th/60th pulled out concluding their little raid. Now Brigadier Hammer’s 15th were getting ready to pursue Matsumoto’s detachment who were fleeing to Kwato. But that is all we have for New Guinea, as were are moving back over to New Britain.

Last time we were over in New Britain, the Americans had captured Hill 660, and were unleashing patrols to try and figure out where the Japanese were concentrating. Now they sought to secure the Borgan Bay-Itni river line. Meanwhile on the other side, General Matsuda’s battered men had begun a retreat heading east via the Aisalmipua-Kakumo trail towards Kopopo. They also received reinforcements in the form of the fresh 51st reconnaissance regiment who took up the job of rearguard. The Japanese knew the terrain better than their American counterparts, thus held distinct advantages. They knew good grounds to put up defenses and how long they could hold out in such places until they should retreat. The Americans did not enjoy good maps, they had to painstakingly explore where they went. They relied on native reports on where to go, but in the end they were like explorers jumping into jungles, atop mountains and a hell of a lot of swampy terrain. The rainforests could be so dense, patrols could be moving yards from another and not know it, imagine trying to find hypothetical objectives in such places?

Thus an enormous amount of vital patrolling was performed, beginning on January 19th with Captain Ronald Slay’s men of L Company 1st marines. They advanced past Mt. Gulu, Langla volcano and Munlulu before heading down the saddle of Mt. Tangi. They managed to ambush a group of 20 Japanese being led by 8 armed natives, who fled east after 6 Japanese were killed. Slay took his men across the east-west government trail, only finding some Japanese telephone wire, which was severed. On the 22nd two patrols each consisting of a reinforced company departed the airdrome perimeter to converge from two directions along the trail junction Captain Slay’s men discovered. The first was elements of the 1st battalion, 1st marines led by Captain Nikolai Stevenson, the other was led by Captain Preston Parish with elements of the 7th marines who took landing crafts to Sag Sag, the terminus of the east-west Government trail. Parishes men would bivouac around 1.5 miles inland near Aipati on the 24th while Stevensons men headed south of Mt Gulu. Both patrols found no Japanese, but Parish gained some valuable intelligence from a native village, who indicated there had been several Japanese parties around.

On the 23rd, Stevenson and his men ran into a concealed machine gun crew 30 yards near Mt Langla. The Americans scrambled to fight back at an enemy they could not see. They did not lose any men, but had no idea if they hit any Japanese either. They continued their advance afterwards and would be ambushed again, this time 1500 yards south of Mt Munlulu. This time they seemed to be facing a force of platoon strength. By the 25th Stevenson and his men were pulling back to Mt Gulu and were relieved by another incoming patrol led by Captain George Hunts K Company, 1st marines. Meanwhile Parish’s patrol continued east as the natives had indicated to them where the Japanese might be retreating through. On January 27th Hunts company ran into Parish’s and both shared information and went in opposite directions hoping to hunt down nearby Japanese units. Hunt set off to the location where Parish’s men had run into a Japanese ambush previously, expecting to find at least 50 Japanese. At 7am on the 28th, Hunt’s men came across an outpost line and engaged it for hours, seeing 15 casualties. Hunt pulled his men back out of mortar range and the Japanese swarmed upon them forcing the Americans to perform some heated rearguard actions. Overall these patrols amongst others allowed the Americans to get a better picture of the terrain and concentration of the enemy.

For two weeks the American patrols searched for the enemy headquarters running into countless skirmishes, mostly against the forces of Colonel Sato Jiro. By the 27th, Matsuda had reached Kokopo and received new orders from General Sakai that he was to take the men further on towards Iboki. Colonel Sato was to again provide the rearguard. This allowed the Americans to seize Nakarop, a placed their translators had mistranslated from Japanese documents as “Egaroppu”. It had been the nerve center of General Matsuda’s operations. They found countless abandoned tents in bivouac areas, the village contained native and Japanese built structures. There was a huge sign saying "Matsuda Butai Army Command Principal Place." There were traces of elaborate radio installations recently removed containing an American-made telephone switchboard labeled "Glory Division." It would turn out Matsuda's personal quarters, however, were actually located off the main trail roughly midway between Magairapua and Nakarop, its approaches so skillfully concealed that patrols did not find it until several days later. Well camouflaged bivouac areas also infested this entire region. With the capture of Matsuda’s former headquarters, all patrols were combined into the Gilnit Group led by the legendary Colonel Chesty Puller. Puller pointed his force in the direction of the Borgen Bay-Itni River to clear it out. They departed Agulupulla on January the 30th as the 5th Marines relieved the 2nd battalion, 1st marines to attack the Iboki area. Attempts were made at leapfrogging, using landing craft to hit places hoping to trap Japanese during the advance.

The landing craft were operated by the Boat Battalion, 533d Engineer Boat and Shore Regiment, of the Army's 2d Engineer Special Brigade. They were made available to carry out the amphibious phase, and the division's little Cub artillery spotter planes for observation and liaison. Rough seas frustrated the first landing attempt at Namuramunga on February 4th, forcing two patrols from the 2nd battalion to proceed overland from Old Natamo via a coastal track. They got as far as Mambak killing a few stragglers and taking 3 prisoners. The next day another patrol landed at Aliado and advanced down the coastal track to the mouth of the Gurissa river through Kokopo and Gorissi. By the 10th of february they managed to kill 16 stragglers and grabbed 6 prisoners who they brought back to the Borgen Bay perimeter. Meanwhile the 3rd battalion advanced into Gorissi by boat on the 12th and setup a radar station. They then dispatched a patrol to the EI river on the 16, finding it impassable. Another patrol was sent to leapfrog around the Arimega Plantation on the 19th. It was seized quickly and now the Americans were very close to Iboki.

Meanwhile Sato reached Kokopo, but did not linger long and continued on to Karai-ai by February 12th. That day the 3rd battalion, 5th marines, aware of the Japanese course, set up an advance base at Gorissi. Now 20 miles separated the Japanese rearguards from their pursuers. Sato and his men would reach Iboki by February 16th, while the Marines were fording the El river, 30 miles behind. It would take them 5 additional days to reach Karai-ai. To the south Puller’s group had reached Gilnit and Nigol on the 10th, finding no enemy. These actions saw the Americans secure the western half of New Britain. 2 days later, Company B of the 1st Marines landed on Rooke Island where they set up a radar installation. They also had to patrol the islands to see if any Japanese remained upon it. They fanned out, running into native villages who offered them fresh fruit. They would come across machine gun emplacements, abandoned bivouac areas and some medical stations, but no Japanese. The enemy had clearly evacuated the island

All the way back over at the Arawe area, Major Komori had received new radios on February 5th enabling him to resume communications with the 17th divisional HQ. He received a gloomy report  “At present, the airfield is covered with grass 4 to 5 [feet] high. The airfield, 200 m [sic] in width 800 m in length, will be serviceable only for small airplanes. However, it will take quite some time to develop it. Consequently, I believe that it will not be of great value.” Knowing about Matsuda’s withdrawal, he began casting envious eyes in the same direction. On February 8, he hinted more broadly to that effect: “As has been reported, the value of Merkus airfield is so insignificant that it seems the enemy has no intention of using it… Due to damage sustained by enemy bombardments and to the increased number of patients, it becomes more and more difficult to carry out the present mission… It is my opinion that as the days pass, replenishment of supplies will become more and more difficult and fighting strength will be further diminished; our new line will be cut off and consequently leave us with no alternative but self-destruction.” Divisional HQhowever was not pleased with this and sent a telegraphic response the following day ordering him curtly to continue his mission. Komori would write in his diary that day "Wondered what to do about the order all night long. Could not sleep last night… I felt dizzy all day today." Fortunately for Komori, on February 17th Sato was ordered to occupy key positions at the Aria river’s mouth to help supply him by land. This allowed Komori to begin his retreat north on the 24th while Sato evacuated the Iboki stores to Upmadung. Komori’s departure would be just in the nick of time as the Americans dispatched two tank platoons to clear out the airfield area on the 27th. They would find zero enemy resistance and this would put an end to the Arawe operation. And that will be all for today for New Britain as we are going to be covering some big allied planning.

Over in the southwest and south Pacific Areas, General Douglas MacArthur continued his plan to drive back towards the Philippines. This would be done via amphibious operations along the north coast of New Guinea. His next main target was the Vogelkop Peninsula, then the Palau Islands, then the invasion of Mindanao. This would also see the Japanese lines of communications to the Dutch East Indies cut off. Yet before all of this he needed to capture the Hansa Bay area of northeastern New Guinea and then Hollandia in the Dutch part of New Guinea. This action would allow his forces to bypass the Japanese stronghold at Wewak. Meanwhile there were the ongoing efforts to reduce Rabaul, and to continue that he still had to capture the Admiralty Island and Kavieng, which would completely cut off Rabaul. The planners for the south, southwest and central Pacific Areas met at Pearl Harbor on January 28th. However the Joint Chiefs of Staff decided to delay MacArthur’s invasion of the Admiralties and Kavieng pushed it to April 1st. They had determined it was better to prioritize the invasion of the Marshall islands in the central pacific. This delay would further delay most of the southwest pacific operations along the New Guinea coast.

Meanwhile Admiral Kusaka and General Imamura had sent the bulk of the 230th regiment and the recently arrived 1st independent mixed regiment to New Ireland. The 2nd battalion, 1st independent mixed regiment was sent to the Admiralties on January 25th, joining up with Colonel Ezaki Yoshio’s 51st transport regiment. Then the 1st battalion, 229th regiment was sent to the Admiralties on february 2nd. These were last ditch efforts by the Japanese to secure a very desperate lifeline for Rabaul. No offensive could be mounted for at least 3 months, thus the Japanese were given ample time to reinforce and strengthen their defenses.

Admiral Halsey also had plans to invade the St Matthias Islands as a preliminary for the attack upon Kavieng, and this like MacArthur's plans were thrown into disarray. In view of all of this MacArthur suggested to Halsey a new plan, codenamed Operation Squarepeg, to seize the Green Islands and establish a new PT boat and or air base there. With that in hand they could project air and naval power further against Rabaul and perhaps even as far as Truk. However many of the officers did not believe any of this would significantly isolate Kavieng and Rabaul. Furthermore, they believed it doubtful that fighters stationed at a base in the Green Islands would even be able to cover Kavieng. Admiral Wilkinson, with the backing of Admiral Fitch and General Geiger, suggested that the proposal be abandoned, and that plans be laid for a landing either at Borpop or Boang Island. On 28 December, however, after analyzing the situation, Colonel William E. Riley, Admiral Halsey's War Plans officer, made the following observation: “There is no doubt but that the occupation of this area [Borpop] and the utilization of air facilities thereat would assist materially in the neutralization of both Rabaul and Kavieng. However, the grave possibility that such an operation would result in the employment of approximately two divisions and additional naval support, not now available and will--in all probability--not be made available in time for this type intermediate operation, makes it necessary to eliminate Borpop as a possible intermediate operation… Though Green Island is not as far advanced as Boang Island, yet it is quite possible to provide fighter cover for strikes on Kavieng. In addition, dive bombers, based on Green Island, can operate most effectively against shipping at Kavieng.”Thus Halsey elected to go ahead with Operation Squarepeg anyway because a fighter umbrella could be tossed over the Green Islands during an amphibious invasion, something that would not be possible for Boang or Borbop.

Halsey’s staff went to work planning the amphibious landing. It would be carried out by elements of General Barrowclough’s 3rd New Zealand Division. PT 176 and PT 178 of Lieutenant-Commander LeRoy Taylor’s Torokina Squadron conducted hydrographic reconnaissance of the islands on January 10th and discovered the southern channels near Barahun island were the most suitable. 300 men of the 30th New Zealand battalion led by Lt Colonel Frederick Cornwall got aboard the APDs Talbot, Waters and Dickerson, covered by the destroyers Fullam, Bennet, Guest and Hudson led by Captain Ralph Earle. They landed on Nissan Island and performed a survey finding a promising airfield site. They also discovered there were no more than 100 Japanese at a relay station alongside 1200 native Melanesians. Pretty sure I said this before in the series, but I will repeat it. Melanesians are one of the predominant indigenous inhabitants of the Melanesian islands that are found in the area spanning New Guinea to the Fiji Islands. Something pretty neat about them, along with some indigenous Australians, they are the few groups of non-Europeans to have blond hair. The Melanesians were so friendly to the New Zealanders and so hostile to the Japanese that it was decided to omit the usual preliminary naval and aerial bombardment for the landings.

Now over in the Central Pacific plans to invade the Marshall were underway, even before the successful liberation of the Gilberts. The operation was codenamed Operation Flintlock, and Admiral Nimitz assigned the 4th Marine division, reinforced with the 22nd marine regiment and Army’s 7th division to train intensively for amphibious warfare. They were deemed Tactical Group 1, led by Brigadier General Thomas Watson. They would be backed up by a whopping 23 aircraft carriers, 15 battleships, 18 cruisers and 109 destroyers. Yet things had certainly changed since 1942, the American Navy was packing overwhelming heat. Admiral Spruance, now commander of the 5th fleet, would hold the highest operational command for Operation Flintlock. Admiral Turner would be commanding task force 51 and the Joint Expeditionary Fleet and General Holland Smith would be commanding all the expeditionary troops. General Smith's position in the chain of command in relation to Admiral Turner was made much clearer than it had been during the Gilberts operation. Simply put he was put in direct command of all landing forces and garrison forces once they were ashore. The troop commanders of each of the landing forces, the 7th and 4th Marine Divisions, were expressly placed under Smith until such time as Admiral Spruance should determine that the capture and occupation phase of the operation had been completed. However, Smith's authority as commander of expeditionary troops had one limitation. It was recognized that "the employment of troops, including the reserve troops engaged in the seizure of objectives, is subject to the capabilities of the surface units to land and support them," thus any directives issued by Smith as to major landings or as to major changes in tactical plans had to have the approval of Turner before they could be issued. To this extent, the expeditionary troops commander was still subordinate to Turner. They would also be supported by Rear Admiral Marc Mitscher’s fast carrier force, task force 58 and Admiral Hoovers land based air forces, including the 7th air force and other Navy air forces. So yeah, America was coming in overkill.

Nimitz’s original plan was to advance into the Marshalls by simultaneously hitting Kwajalein, Maloelap and Wotje. Together these contained 65% of the aircraft facilities in the island group, leaving the 35% remainder on Jaluit and Mille. Jaluit and Mille could be neutralized and bypassed. Yet after facing the difficulties during the Gilberts operation, Nimitz decided to also bypass Maloelap and Wotje as well, so he could concentrate all his forces against Kwajalein. General Smith and Admirals Spruance and Turner opposed this, arguing that sailing into Kwajalein would be too exposed if Maloelap and Wotje were left unoccupied.

Nimitz 'new plan would see General Corlett’s 7th division hit the southern group of islands in the atoll, including Kwajalein island, while Major General Harry Schmidt’s 4th marines would hit Roi-Namur and the other northern islands of the atoll. Task Force 52, would transport the 7th Division while Rear Admiral Richard Conollys task force 53 transported the 4th marines. After some meetings, Spruance managed to secure the invasion of Majuro, which would be carried out by Lt Colonel Frederick Sheldon’s “Sundance” Landing Force. They consisted of the 5th amphibious corps reconnaissance company, the 2nd battalion, 106th regiment and the 1st defense battalion. Spruance wanted to make the atoll a fleet base, so airfields could be constructed to help cover the line of communications to Kwajalein. To support the main landings, Mitschers fast carrier force was going to smash the enemy aircraft and air facilities at Wotje, Maloelap, Roi-Namur and Kwajalein while his vessels simultaneously coordinated with Turners cruisers and Rear Admiral Ernest Small’s Neutralization group task force 50.15 to naval bombard them as well. The main threat that needed to be neutralized quickly was Eniwetoks airfield. Meanwhile Hoover’s land based aircraft would help neutralize Mille and Jaluit and help smash the other islands and shipping.

Throughout November and December, two atolls would receive more attacks than the others. Mille closest to the Gilberts, thus much more accessible, earned the lionshare of attention. Maloelap with its large air facilities had to be kept under constant surveillance and attack, thus she came second. Beginning on December 23rd, aircraft based out of the Gilberts began increasing air strikes against the Marshalls.  On Mille between November 24th to December 18th, 106 heavy bombers dropped 122 tons of bombs over the runways and facilities. The next week bombers and fighters began attacking Mille’s fuel dumps, leveled all buildings, destroyed 11 grounded aircraft and another 13 in the air. Mille was neutralized and the Japanese would abandon its airfield by January. The damage dished out to Maloelap was extensive, but not as crippling. Her runways were not entirely put out of operation. From January 11th to the 25th, B-25’s destroyed her ground installations, but still her airfield remained operational. On January 26, 9 B-25s, followed by 12 P-40s, flew into Taroa for a low-level attack. The B-25s destroyed 9 interceptors on the ground and 5 more after they were airborne. The control tower and two other buildings on the airfield were set afire and four tons of bombs were dropped in fuel dump and dispersal areas, starting large fires. As the B-25s left the target to return to Makin they were chased by about 15 Japanese fighters. 30 miles south of Maloelap the 12 P-40s met the bomber formation and immediately engaged the enemy fighters, destroying11 of them and severely damaging 2 more. The strike of January 26 was decisive. Practically all of the remaining enemy air strength at Maloelap had been destroyed, and the once formidable base was rendered almost powerless to defend itself against air strikes,  thus neutralized. Jaluit was subjected to 15 attacks reduced to rubble and Wotje was hit 14 times suffering extensive damage.

Meanwhile Admiral Pownalls task force 58.1 and 58.3 consisting of 6 fast carriers, 5 heavy cruisers, 2 light cruisers, 3 of the new class of anti aircraft cruisers, and 12 destroyers hit Kwajalein on December 5th. That day saw her attacked by over 246 aircraft. As a result 19 Japanese interceptors and 4 bombers were destroyed at Roi-Namur, 7 cargo ships were destroyed at Kwajalein and extensive damage was inflicted upon both bases. Simultaneously, 29 aircraft hit Wotje where they destroyed 5 grounded aircraft, set fire to hangers, machine ships and barracks. Japanese interceptors attacked Pownall’s carriers, though they were unable to inflict serious damage. Following these attacks, Hoover’s aircraft continued to smash Kwajalein, tossing 10 attacks, dropping nearly 210 tons of bombs on the atoll. Roi-Namurs airfield still remained operation by January 29th however, though she only had 35 aircraft on Roi-Namur; 10 reconnaissance planes on Kwajalein; 13 aircraft on Maloelap; 12 on Wotje and 15 on Eniwetok. The Japanese did not have any effective air force to defend the Marshalls any more. The feeling of the men on the islands, was doom.

I would like to take this time to remind you all that this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Please go 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 after that, give my personal channel a look over at The Pacific War Channel at Youtube, it would mean a lot to me.

Finally the Australians had taken the formidable position known as Shaggy Ridge. The Japanese continued the harrowing marches going north as their enemy would not let up. In the Marshalls the IJA and IJN personnel were inflicted the full might of American’s wartime productivity, and they all knew Uncle Sam was coming to pay them a visit soon.