Last time we spoke about the Liberation of Mindanao. In the spring of 1945, as the battle for Okinawa intensified, American forces relentlessly confronted entrenched Japanese troops. General Buckner's 10th Army faced fierce resistance amidst harsh weather and dwindling supplies. Despite these challenges, they captured the strategic Shuri Castle, marking a critical turning point as Japanese troops retreated. Simultaneously, the liberation of Mindanao was underway. American troops, under General...
Last time we spoke about the Liberation of Mindanao. In the spring of 1945, as the battle for Okinawa intensified, American forces relentlessly confronted entrenched Japanese troops. General Buckner's 10th Army faced fierce resistance amidst harsh weather and dwindling supplies. Despite these challenges, they captured the strategic Shuri Castle, marking a critical turning point as Japanese troops retreated. Simultaneously, the liberation of Mindanao was underway. American troops, under General Eichelberger, rapidly advanced, overcoming fortified Japanese defenses in mountainous terrain. With the 24th Division securing key locations like Digos and Davao, the 31st Division pushed northward against General Morozumi’s forces. Despite stubborn resistance, American forces displayed tenacity and courage, leading to significant victories. By May 20, the Americans approached Malaybalay, where remnants of the 30th Field Artillery Regiment held their ground. As Japanese troops attempted to regroup, they faced relentless assaults from the advancing American divisions. Throughout the campaign, the Americans endured heavy casualties, but their determination led to more than 10,000 Japanese losses.
This episode is the North Borneo Offensive
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.
As we continue our story, by June 9, General Buckner's forces had pushed through to the enemy's main defensive line on the Kiyamu Peninsula. It was there that General Ushijima was preparing to make his final stand. Meanwhile, General Shepherd’s 6th Marine Division landed on the Oroku Peninsula, determined to dismantle a stubborn pocket held by Admiral Ota’s naval units. On June 10, the pace of the assault quickened dramatically. Colonel Shapley’s 4th Marines broke through enemy defenses, capturing the strategic Hills 58 and 55(2). At the same time, Colonel Roberts’ 22nd Marines secured Hills 28 and 55(1). Although Colonel Whaling's 29th Marines made only limited progress, they effectively identified the last significant pocket of resistance in the high ground west of Oroku village. Looking south, General Del Valle’s 1st Marine Division also reignited its offensive. Colonel Snedeker’s 7th Marines successfully advanced into Itoman and Tera, while Colonel Mason’s 1st Marines, supported by tanks, cleared the southern slopes of the key ridge between Tera and Yuza, capturing Yuza Hill in the process. To the east, General Bradley’s 96th Division launched a renewed attack, bolstered by artillery and tank support. Colonel May’s 383rd Regiment advanced approximately 700 yards toward the town of Yuza. Meanwhile, Colonel Halloran’s 381st Regiment pushed into Yunagusuku and Tomui. However, they faced fierce resistance, quickly encountering heavy machine-gun fire originating from the heights of Yaeju Dake, which halted their advance.
Meanwhile, General Arnold’s 7th Division continued its relentless push toward Nakaza, employing the full might of their tanks and artillery. Colonel Finn’s 32nd Regiment steadily advanced onto the eastern slopes of Hill 95, pressing toward Hanagusuku. At the same time, Colonel Pachler’s 17th Regiment fought to solidify its precarious position on the southeast end of Yaeju Dake. Back at sea, a kamikaze attack tragically sank the destroyer William D. Porter. That same day, Admiral McCain’s Task Force 38 unleashed a barrage of bombs and artillery on Minami Daito Island before retreating to Leyte-Samar after 89 consecutive days off the coast of Okinawa. This marked the conclusion of their role in Operation Iceberg. The following day, the sustained pressure from Arnold's offensive began to fracture General Suzuki’s 44th Independent Mixed Brigade on both flanks.Seas of flame engulfed Hill 95 on 11 June as 1/32 slowly advanced toward the crest of the enemy position behind the jets of armored flame throwers. Flame fuel was pumped and sprayed from hoses over portions of the ridge inaccessible to tanks and then ignited. Infantrymen moved among the still hot and smoking rocks and drove back the surviving defenders. That night the battalion dug in just short of the Hill 95 peak. Although little forward progress was made by 2/32 or the 17th Infantry on 11 June, the enemy position was considerably weakened. Intensive fire from supporting weapons was concentrated against the slopes of Yaeju Dake, and strong patrols cleaned out enemy groups that held positions near the 7th Division front lines. The 32nd Regiment achieved a significant victory by capturing the peak of Hill 95, while the 17th Regiment struggled to make further headway
To the west, advances in the 96th Division zone were minimal as Bradley's regiments focused on consolidating their newly-won positions amidst intense enemy fire. Simultaneously, at Yuza Hill, fierce counterattacks were thwarted, and Mason’s 2nd Battalion accomplished the critical capture of Hill 69, just west of Ozato, despite heavy machine-gun fire coming from Yuza Dake. Further east, ahead of the 7th Marines, some 800 yards from the southern fringes of the two settlements, lay "the scene of the most frantic, bewildering, and costly close-in battle on the southern tip of Okinawa"Kunishi Ridge. This precipitous coral escarpment constituted the western-most anchor of the last heavily defended line on Okinawa. The ridge contained innumerable caves, emplacements, and tombs on both the forward and reverse slopes. The intervening area between this formidable fortress and the lines of the 7th Marines was a broad valley of grassy fields and rice paddies which offered no protection to advancing infantry. The supporting tanks were restricted to two approaches into the position: a road across the valley which cut through the center of the ridge and another along the coast line. Both of these routes were covered by anti-tank guns. Shortly after noon patrols from the 1st and 2nd Battalions moved out with armored support to probe the Japanese defenses. Intense frontal fire from Kunishi Ridge, enfilade fire from the enemy on Hill 69 opposing the attack of 2/1, and artillery concentrations directed at the tanks forced a withdrawal at 14:47. Because of the complete fire coverage of the open valley enjoyed by the Japanese, both from the heights and slopes of the ridge itself and from the Yuza Dake area, it was apparent that a daylight assault of the position would be a costly affair. Consequently, after Colonel Snedeker had made a personal reconnaissance of the objective from a light liaison plane, it was determined to attack at night. The commanding officers of the assault battalions were oriented on the general plan during the afternoon. The central road and a line of telephone poles was designated as the boundary between battalions upon which the assault units would guide. The scheme of maneuver contemplated a penetration of the ridge where the road passed through it, followed by an expansion of the initial foothold to the right and left flanks to secure the remainder of the objective in the regimental zone of action. Normal artillery would be placed alternately on Kunishi Ridge and Mezado Ridge (500-600 yards southwest of Kunishi) until H-Hour and thereafter on the latter. On June 11, General Shepherd launched a concerted attack. The 22nd Marines successfully secured the Tomigusuki area and Hill 53, while the 29th Marines faced stiff opposition, making only limited gains against the heavily fortified hills west of Oroku. Meanwhile, the 4th Marines worked to strengthen their line, completing the encirclement of Ota’s naval forces. Nevertheless, the ramparts of the Oroku fortress were cracking, and Admiral Ota released his last dispatch to General Ushijima: “Enemy tank groups are now attacking our cave headquarters. The Naval Base Force is dying gloriously at this moment… We are grateful for your past kindnesses and pray for the success of the Army.”
During the night, artillery units successfully targeted and either killed or dispersed a group of Japanese troops attempting to cross the Kokuba River. Meanwhile, 51 infiltrators were eliminated as they tried to breach the lines held by the 22nd Marines. The following day, the 4th and 29th Marines intensified their efforts to compress the enemy pocket west of Tomigusuki, breaking through to seize Easy Hill while the 22nd Marines consolidated their positions. The capture of this key terrain feature forced the enemy into the alluvial flats along the coast between Oroku and Hill 53. "In the late afternoon enemy troops began displaying flags of surrender. Language officers equipped with loud speaker systems were dispatched to the front line areas to assist in the surrender of those Japs who desired to. The attempt was partially successful, 86 enemy soldiers voluntarily laid down their arms."
For several days General Buckner had been sending messages to the Japanese commander by radio broadcast and air drops pointing out the hopelessness of the enemy situation in an attempt to persuade General Ushijima to surrender. During the afternoon of 11 June, Tenth Army representatives were conducted to the 2d Battalion OP overlooking Itoman to await any enemy party that might desire to negotiate. At 1700 all fire was suspended in the 7th Marines' area pending the doubtful appearance of a white flag. About 15 Japanese wearing white headgear appeared in the 1/7 zone in front of Company A at 1740, but dispersed when hailed. Six of the enemy surrendered to Company C at 1802, but the situation returned to normal two minutes later when hostile mortar fire fell on the captors' position. Final orders for the resumption of the attack were issued by Colonel Snedeker about 2000 setting H-Hour at 0330, 12 June. Both 1/7 and 2/7 were to make the assault with one company each, and at 0225 Company C moved out to establish contact with Company F on the line of departure. The attack was launched on schedule at 0330 and at 0500 Companies B and G moved out in support of the assault companies. Concurrently, Company F reached the objective at a point 500 yards north of Mezado village, as Company C came up on its left to extend the line eastward. The enemy was completely surprised and several small groups were wiped out by Company C while they were engaged in preparing breakfast. At the same time, the 1st Battalion extended the line eastward toward Kunishi. However, the Japanese quickly regrouped, pinning down the attackers for the rest of the day, though the Marines managed to reinforce and consolidate their hard-won gains. By midnight the positions there could be considered reasonably secure. But as General del Valle put it, "The situation was one of those tactical oddities of this peculiar warfare. We were on the ridge. The Japs were in it, both on the forward and reverse slopes." Elsewhere, the 1st Marines focused on mopping up Hill 69, dispatching patrols south through Ozato and maintaining their defenses on Yazu Hill. To the east, another pre-dawn attack initiated by the 17th Regiment caught the defenders off guard.
Colonel Pachler had compelling reasons for favoring a night operation. The defenders held a significant advantage in observation, which had posed serious challenges when the 3rd Battalion of the 17th Infantry seized the southeast end of the escarpment. The coral wall of the escarpment was particularly high at this end, and the narrow routes leading to the high ground were easily controlled by Japanese fire. After days of holding positions at the base of the 170-foot cliff, the troops had grown familiar with the terrain and, as their commander, Major Maynard Weaver, noted, they were eager to reach the top and finally see something new. The night attack was primarily planned for the 1st Battalion, but Colonel Pachler decided to coordinate a move to expand the territory held by the 3rd Battalion as well. The final plan involved three assault companies: Company A would occupy a cluster of coral about a hundred yards beyond the edge of the escarpment, near the boundary between the 7th and 96th Divisions. Company B aimed for a similar objective located about 200 yards to the southeast, while Company L was assigned to capture a small hill situated between the 1st Battalion's targets and the positions held by the 3rd Battalion since June 11. Each company was given a separate route: Company A’s path led straight up the cliff’s face, Company B needed to head south to reach a break in the escarpment before turning right toward its goal, and Company L had an accessible objective near the edge of the escarpment.
Movement was set to begin at 0400 on June 12. Since the attack relied on stealth, no artillery preparation was planned. However, two battalions of 105-mm artillery, one battery of 155-mm howitzers, and an 8-inch howitzer battalion were scheduled to deliver heavy harassing fire during the night. Additionally, 21 batteries registered their fire on the afternoon of June 11 and were ready to provide protective artillery support if needed once the objectives were reached. For added firepower, a section of heavy machine guns was assigned to each assault company. Colonel Pachler meticulously planned the attack, ensuring that every soldier involved understood the details of the operation. Reconnaissance patrols had scouted the trails leading to the high ground, and demolition teams had already prepared known cave positions at the cliff's face with satchel charges. Despite thorough preparations, there was a collective apprehension about potential confusion caused by the unknown conditions of darkness. This anxiety was amplified at 2000 on the night of June 11 when the 7th Division G-2 Section intercepted an enemy radio message indicating, "Prepare to support the attack at 2300." Soon after, another intercepted message stated, "If there are any volunteers for the suicide penetration, report them before the contact which is to be made one hour from now." Meanwhile, from dusk until almost 2300, the Japanese unleashed a heavy artillery barrage, leading front-line troops to anticipate a counterattack. That counterattack did come, aimed at the 1st Battalion of the 32nd Infantry, which had reached the summit of Hill 95 earlier that day, as well as against the 96th Division. However, there was no enemy activity observed in the 17th Infantry's sector.
As night illumination and harassing fire ceased shortly before 0400, the attack proceeded according to plan. The companies moved out in single file. Remarkably, a heavy fog settled over southern Okinawa, creating the perfect conditions for concealment while allowing the troops to follow their paths without confusion. On the high ground, Company A encountered a few civilians wandering about, while the leading platoon of Company B unexpectedly came across three Japanese soldiers as they reached the shelf of the escarpment. The Americans chose to ignore them and continued silently on their way, with the enemy surprisingly not opening fire. By 0530, just minutes after dawn, Companies A and B were in position without firing a single shot. Company L also successfully reached its objective, and eager to capitalize on the fog and absence of enemy fire, its commander sent a support platoon to a small hill fifty yards beyond. This objective was secured quickly, but not without incident; two enemy soldiers were killed in the process. The platoon leader reported their progress but quickly called for mortar fire as about fifty Japanese troops approached in a column. The Americans opened fire with rifles and BARs, disrupting the formation and resulting in thirty-seven enemy soldiers killed, while the rest managed to escape.
The men of the 1st Battalion celebrated the success of the night attack. Shortly after Company A took position, four enemy soldiers stumbled into view and were swiftly eliminated. A few moments later, another four followed suit, meeting the same fate. Company B remained undisturbed until around 0530 when Japanese soldiers attempted to emerge from several caves within the company's area. Although the cave entrances were heavily reinforced with concrete and couldn’t be sealed with demolition charges, the Marines guarded the openings and shot at the Japanese as they appeared. Not long after daylight, Company C began clearing the caves at the base of the escarpment, eventually regrouping with the rest of the battalion on the high ground. By 0800, the situation had stabilized, and the 17th Infantry held strong positions on Yaeju Dake. During the night, the Japanese had withdrawn their front-line troops from Yaeju Dake to escape the punishing artillery fire, intending to reoccupy it before the anticipated 0700 attack. Fifteen hours after the 32nd Infantry fought their way to the top of Hill 95, the 17th Infantry had executed a masterful night attack to seize their portion of Yaeju Dake. Throughout the day, the 2nd Battalion of the 17th Infantry relieved Companies I and K, and with Company L attached and supported by medium and flame tanks, continued the offensive. The 1st Battalion maintained its position, firing at enemy soldiers who were slow to realize that their defensive terrain had been lost. Company B alone accounted for sixty-three Japanese soldiers killed throughout the day.
Taking advantage of this breakthrough, the 381st Regiment advanced to occupy the slopes of Yaeju Dake, while the 383rd extended the division front and secured Yuza. As the situation unfolded, Japanese troops maintained control over Big Apple Peak, which towered about sixty feet above the surrounding plateau. However, by the evening of June 12, the 7th and 96th Divisions had succeeded in forcing the reconstituted 44th Independent Mixed Brigade from the southeastern end of the enemy’s line. General Ushijima acted swiftly, given the limitations imposed by his damaged communication system and the chaos among his front-line units. With his artillery nearly silenced by enemy bombardments and his supplies dwindling faster than his manpower, Ushijima's only hope lay in sending more troops into the relentless shellfire and flames unleashed by American forces sweeping across the frontline.
His urgent order read: “The enemy in the 44th IMB sector has finally penetrated our main line of resistance. The plan of the 44th IMB is to annihilate, with its main strength, the enemy penetrating the Yaeju-Dake sector. The Army will undertake to reoccupy and hold its Main Line of Resistance to the death. The 62nd Division will place two selected infantry battalions under the command of the CG, 44th IMB.” Unfortunately, the 64th Brigade, the part of the 62nd Division that had shifted from Shuri to reserve positions near Makabe, didn’t receive this order until late on June 13, a full thirty hours after it became critical. This piecemeal commitment of reserve troops proved to be grossly inadequate. By June 13, the 44th Brigade was teetering on the brink of destruction. When reinforcements finally arrived, they found the remnants of the 44th Brigade overwhelmed and absorbed into the reinforcing battalions, with still not enough men to hold the line. In a last-ditch effort, the enemy committed the main strength of the 62nd Division, his final reserve, with a desperate plea for cooperation and orders to "reoccupy and secure the Main Line of Resistance." However, by the time the 62nd Division moved onto the line, they ran headlong into General Hodge's forces, who were advancing southward across the coral-studded plateau. The Americans pressed forward, shielded by the fire of machine guns and tanks, advancing over the bodies of Japanese defenders who had fought fiercely to hold their last stronghold "to the death."
On June 13, General Arnold resumed his assault against the rapidly disintegrating 44th Independent Mixed Brigade. The 32nd Regiment successfully secured the Hill 95-Hanagusuku area, while the 17th Regiment expanded its control over the escarpment’s summit. To the west, May’s 3rd Battalion and Halloran’s 2nd Battalion struggled to capture the top of the escarpment despite repeated attempts. However, they significantly diminished the defenders' strength with a relentless volume of covering fire. At the same time, May’s 1st Battalion advanced through Yuza and swept southward to successfully secure Ozato. Meanwhile, General Del Valle prepared to commit the 1st Marines to the fight on Kunishi Ridge, as the isolated 7th Marines continued to be pinned down by heavy Japanese fire, relying on tanks for supplies and evacuation. Further north, the 29th Marines launched an attack southeast to eliminate the enemy pocket, while Shapley’s 3rd Battalion moved swiftly toward the beach, progressively chasing the demoralized Japanese forces from the thick brush and marshy terrain along the waterfront. As they reached the sea wall, the assault turned into a rout. Some of the enemy threw down their arms and fled at the Marines' approach. Large numbers surrendered; but some fought back with hand grenades in desperate, individual last ditch stands, while many more used grenades to destroy themselves in despair. The sea wall was reached at noon, and the remainder of the day was spent running to earth small groups hiding in the cane fields and rice paddies. In the late afternoon General Shepherd notified General Geiger that all organized resistance on Oroku had ceased. In the early hours of June 14, Mason’s 2nd Battalion advanced toward Kunishi Ridge, tenaciously fighting their way to positions east of the 7th Marines, which remained isolated. Simultaneously, Shepherd’s reinforced Reconnaissance Company successfully landed on Senaga Island, completing the occupation of the Oroku Peninsula. Looking south once again, May’s 1st Battalion completed the cleanup in Ozato but soon had to withdraw from its vulnerable position, while the rest of the 383rd Regiment pressed forward to the edge of the escarpment west of Yaeju Dake. To the east, despite heavy mortar and machine-gun fire, the 381st Regiment maintained constant pressure on the northern face of Yaeju Dake, finally reaching the top of the escarpment by nightfall. Their success allowed them to link up with the 7th Division, which dealt a crushing blow to the 13th Independent Battalion, advancing approximately 300 yards across the front.
After a night of disorganized counterattacks and infiltration attempts, the 7th Division launched an assault toward Hills 115 and 153, advancing about 1,200 yards and reaching the outer slopes of the hill positions. To the west, the 381st Regiment and May’s 3rd Battalion successfully secured the escarpment between Yuza and Yaeju Dake, although the remainder of the 383rd struggled to move forward due to heavy fire from Yuza Dake. On Kunishi Ridge, the pressure from the Japanese remained relentless, restricting the 7th Marines to only minor local gains. However, Mason’s 2nd Battalion managed to inch its way along the ridge, successfully extending the line by about 200 yards to the east. Behind them, Colonel Griebel’s 5th Marines began to relieve the weary 1st Marines, with Griebel’s 2nd Battalion finally moving forward during the night to support Mason’s isolated 2nd Battalion. On June 16, after an intense bombardment of artillery, mortars, and rockets, the 7th Marines finally broke through. Snedeker’s 1st Battalion advanced along the northern slope of Kunishi Ridge, while the 2nd Battalion extended the line into the initial high ground of the Mezado hill mass.
Concurrently, Griebel’s 2nd Battalion advanced, making slow but steady progress until they secured a coral peak on the ridge that commanded their position. To the east, the 62nd Division, attempting to move from its reserve locations southwest of Makabe to support the faltering Japanese lines, faced devastating fire from artillery, ship guns, and aerial bombardments of rockets and napalm. Seizing the opportunity created by the relentless bombardment of enemy rear areas, Bradley launched his battalions through the Yuza Dake perimeter. Colonel Dill’s 382nd Regiment pushed through the 383rd and advanced toward Ozato, aiming to gain control of the high ground southwest of Yuza, while May’s 3rd Battalion successfully captured Yuza Dake. Additionally, the 381st Regiment gained approximately 600 yards along its front, reaching the saddle between Yuza Dake and Hill 153. Meanwhile, the 17th Regiment pressed onto the forward slopes of Hill 153, and the 32nd Regiment, driving down the coast, took Hill 115, effectively eliminating the 15th Independent Mixed Regiment. Back at sea, despite a significant depletion of Japanese air strength, a kamikaze attack succeeded in sinking the destroyer Twiggs.
But now, it’s time to leave Okinawa and turn our attention to Borneo, where we continue covering the Australian offensive. As we last noted, by May 6, Brigadier Whitehead’s 26th Australian Brigade had successfully landed on Tarakan, pushing the Japanese garrison into the island’s rugged interior. By the evening of 6th May fairly copious information obtained from prisoners and Indonesians and from captured documents indicated that the enemy had about 390 naval troops in the Mount Api area, about 400 troops and civilians in the Fukukaku headquarters area (embracing Hills 105 and 102), 200 from Sesanip along Snags Track to Otway, 300 on Otway and in District VI, 300 in the Amal River area and 60 at Cape Juata. Having lost the airfield and the water-purifying plant and hospitals "the enemy at this time was displaying a decided disinclination to hold ground. In particular he was shunning any ground which could be subjected to heavy bombing, shelling, or attack by tanks; or against which large-scale attacks could be launched by our troops"; and he was directing his operations to delaying the attackers, particularly with mines, booby-traps, suicide raids, and isolated parties fighting to the death in tunnels and dugouts. The 4th Company of Tokoi Force (IJA) plus the 1st Company of the 2nd Naval Guard Force were on Hill 105, Margy and Janet; the 1st Company of Tokoi Force, and other troops were on Hill 102. In the north was a composite group.
To secure the recently captured airfield from potential counterattacks, raids, or indirect fire, Brigadier Whitehead decided to deploy the 2/48th Battalion to gain the high ground north of the town, reaching up to Snags Track. The 2/4th Commando Squadron was tasked with advancing along Snags Track toward the Sesanip oilfields, while the 2/3rd Pioneers were assigned to sweep the high ground east of the town and move along John’s Track to the mouth of the Ama River. Meanwhile, the Dutch company was to clear the unoccupied Cape Batu peninsula, a task that proved surprisingly straightforward. In the Mount Api area, however, the 2/23rd Battalion faced fierce resistance, particularly at Tiger and along Crazy Ridge, resulting in minimal progress until they were relieved by the 2/24th Battalion on May 9. Further to the right, the 2/48th Battalion seized Otway without opposition, and the commandos successfully cleared Snags Track up to Haigh’s by May 8, though tanks could not advance any further. The pioneers, on the other hand, encountered heavy resistance along John’s Track, which they couldn’t overcome until May 9. That day, a long-distance patrol from the 2/24th Battalion also succeeded in driving the Japanese out of the Juata oilfields after a skirmish. On May 10, while the 2/48th and the commandos patrolled aggressively forward, the pioneers began their assault on the heavily defended Helen feature, which would successfully repel repeated Australian attacks for the next five days. Simultaneously, the 2/24th faced strong resistance in the Mount Api area but tenaciously pushed forward to Hill 105 on May 11, capturing Tiger the following night. They conducted patrols that probed about 1,000 yards southeast, cutting Snags Track at several points. On May 12, the 2/48th set out to cut King’s Track and clear the heights from Sykes to Butch. The next morning, they successfully attacked and captured the knoll north of Snags Track.
Meanwhile, following a highly effective air bombardment, the key Helen feature was found abandoned on May 15. This allowed the pioneers to clear John’s Track and reach the coast at the mouth of the Amal River. Concurrently, the commandos secured the Agnes feature, followed by the 2/24th Battalion’s capture of Elbow on May 16. The remaining positions on Hill 105 were then subjected to intensive bombing and bombardment, leading to an Australian assault on May 19. They finally captured the feature the following day. In the meantime, the 2/48th Battalion moved to Agnes to attack the Freda feature on May 14.
It was now evident that if the Freda hill was to be taken the attack must have heavier support. Therefore, on 22nd May, 12 Liberators and 12 Lightnings were sent out with bombs and napalm, but the cloud was so low that some of the heavy bombers did not find the objective. Then the artillery and mortars fired, and a two-company attack went in, the infantry moving very close behind the barrage. Gooden's company thrust from the east, and Captain Nicholas's advanced with one platoon pushing east along Snags Track towards Track Junction Knoll and another pressing north. The former platoon (Lieutenant Harvey), moving through very difficult country along a razor-back so narrow that only two men could be deployed on it, edged forward under heavy fire; after losing one killed and 4 wounded and finding the enemy becoming stronger Harvey manoeuvred out of this position. It was then found that a wounded man was not with them, so Harvey and three volunteers thrust back and engaged the enemy fiercely while the wounded man was carried out. During the day Gooden's company on the right had encountered two strongly-held knolls. Derrick's platoon succeeded in cutting the saddle between them and taking one knoll. Derrick's platoon and another launched “a most courageous attack up the steep slopes of Knoll 2 in the fading light. Here, in some of the heaviest and most bitter close-in fighting of the whole campaign these two platoons finally reached the top and secured the Knoll after inflicting heavy casualties on the enemy.... [Lance-Sergeant] Fennells time and again ... crawled ahead of the attacking troops, even to within five yards of the enemy, and gained vital information. On one occasion, when his section was forced to ground he had charged the Jap positions with his Owen gun blazing and had silenced the enemy post, killing the occupants. In a similar manner, Private W. R. How found the advance of the troops checked by a well-sited pill-box, raced forward with his Owen firing until within grenade range, and then, throwing grenades, moved in for the kill until he fell wounded. He had silenced the post and killed the machine-gunner, thus allowing the advance to continue.” At this stage 28 enemy dead had been counted; one Australian had been killed and 15 wounded.
Unfortunately, the Japanese counterattacked the following day, effectively recapturing the position. Following a devastating combination of air and artillery bombardment, the Australians managed to secure Freda and Track Junction Knoll on May 25. During this time, the 2/23rd Battalion remained in close contact with a resolute enemy at Janet and Margy but struggled to make significant progress. The 2/24th Battalion continued probing northward and captured the Droop feature on May 26. After another failed attack on May 29, a heavy air and artillery bombardment supported the 2/23rd as they finally captured Margy on May 31. Concurrently, the 2/24th successfully attacked and held the Poker Hills. On June 1, the 2/48th Battalion then attacked Hill 102, supported by aircraft and machine-gun fire. Lieutenant O'Rourke's platoon attacked, following an artillery barrage as closely as they could, and bringing with them three flame-throwers. They gained the forward slopes without being fired on and then saw five Japanese moving towards them, evidently to re-enter their positions after the bombing. These were fired on while the flame-throwers were brought into action. One operator sprayed the slope from side to side while another fired straight up it. “The result was devastating (said O'Rourke later). The hill was set completely ablaze to a depth of 50 yards, two of the five Japs were set on fire and the other three killed in their posts. The platoon was able to advance almost immediately through the flames, and with the help of the flame-throwers the feature was com-pletely captured within 15 minutes of the advance commencing. The flame which was fired up a slight rise hit the trees on the crest and also sprayed the reverse slope and had the effect of completely demoralising the enemy.“ While the Australians launched an unsuccessful assault on Wally, the 2/23rd Battalion was engaged in clearing out the remaining Japanese forces from Margy and its surrounding areas.
On June 6, the Australians finally secured Wally, and the 2/24th Battalion also managed to capture Roger. In the early hours of June 10, the Japanese launched a counterattack toward Hill 105, but it was easily repelled. At the same time, the defenders began preparing for a withdrawal northeast into the island’s interior, planning to split into independent groups to wage guerrilla warfare. Despite the looming withdrawal, Whitehead’s battalions commenced attacks on Beech 2, Joyce, and Linda on June 11. However, progress was slow over the next three days, with the only notable achievement being the capture of Sandy on June 13. By nightfall that day, the Japanese finally began their withdrawal, leaving behind only rearguards to hold the crucial Essie Track. This allowed the Australians to capture the abandoned features of Linda, Joyce, Clarice, Hilda Paddy, Melon, and Aunty on June 14. The next day, the Australians took Nelly and Faith, but the Japanese rearguard on Essie Ridge managed to temporarily halt their pursuit. Eventually, however, Essie Ridge was overrun, and by June 16, Fukukaku was cleared. The 2/48th Battalion then pursued the Japanese as they fled eastward from Essie. On June 18, they caught a few but found that a large group had scattered into smaller parties. By June 19, patrols were radiating east, north, and west in pursuit, with Japanese forces standing firm at several points. Ultimately, the fall of Hill 90 on June 20 marked the end of organized resistance on Tarakan. Following this victory, Whitehead initiated a mop-up operation that would continue until the war's end. While the 26th Brigade was fighting to secure Tarakan, General Wootten’s 9th Australian Division was preparing to launch the invasion of the Brunei Bay area of north Borneo, codenamed Operation Oboe VI.
At the Manila conference in April General Morshead had learnt that OBOE I (Tarakan), OBOE VI (north Borneo) and OBOE II (Balikpapan) were to be carried out in that order. 34 LSTs would be allotted for OBOE VI but had to be released by 23 days after the landing. There were other fairly severe restrictions on the vessels available: the one boat battalion of the American Engineer Boat and Shore Regiment and the one amphibian tractor battalion allotted to OBOE VI had to be used for Balikpapan. Morshead and his staff arrived back at Morotai from Manila on April 21 and next day the Corps issued its staff study of the north Borneo operation, and the 9th Division's staff, which from April 4 to 17 had been planning an operation against Balikpapan, began preparing an outline plan for an attack on Brunei Bay instead. This was presented to Corps and approved on April 26; the final plan, which contained no major changes, was approved on May 16. Meanwhile a variety of problems had arisen at the Corps level and above. On May 1, 2200 troops and 1200 vehicles (including guns) of the 9th Division were still in the Cairns or Atherton areas awaiting shipment, and some of the stores and equipment were not scheduled to arrive at Morotai until May 25, two days after the proposed date of the landing. It also appeared that, on the day of the landing, the 24th Brigade would lack some unit stores and vehicles, and the 20th Brigade would possess only one battalion; there would be no field or anti-aircraft guns, a shortage of signal vehicles and equipment, no equipment for building wharves and bulk oil storage, and neither of the casualty clearing stations allotted would be present.
Due to a series of issues at the Corps level and above, the invasion plan had been scaled down to a landing by a brigade on Labuan Island and just a battalion on Muara Island, with the operation further postponed to June 10. The strategy involved landing Brigadier Selwyn Porter’s 24th Brigade on Victoria Harbor’s Brown Beaches to capture the Labuan airfield and eliminate all hostile forces on the island. Simultaneously, Brigadier William Windeyer’s 20th Brigade would put ashore the 2/15th Battalion on Muara Island’s White Beach and the 2/17th Battalion on Brunei Bluff’s Green Beach. These units were tasked with capturing Brooketon and securing the southern and western sides of Muara Island, setting the stage for an advance on Brunei Town. Upon capturing these objectives, the 9th Division was to occupy and defend the Brunei Bay-Beaufort area and take control of the Miri-Lutong-Seria regions. Once again, Admiral Barbey’s Naval Attack Force, primarily comprising Admiral Royal’s transports and Admiral Berkey’s cruisers, was designated to facilitate the amphibious movement of troops to Brunei Bay. In preparation for the invasion, American and Australian air forces, under General Kenney’s command, targeted airfields and other military installations, focusing particularly on destroying bridges on the railway to Jesselton to prevent the arrival of reinforcements to Labuan by rail. On June 4, Barbey’s convoy finally departed Morotai, embarking on its 1,100-mile voyage to Brunei Bay. Air attacks intensified on June 5, successfully rendering the Papar River bridge unusable. Four days later, on June 9, the air campaign reached its peak: 54 Liberators and 24 Mitchells launched strikes against targets on Labuan, while 23 Liberators targeted the Brooketon area.
In the meantime, minesweepers successfully cleared a channel into the bay, destroying 69 mines between June 7 and 9. Berkey’s cruisers sailed ahead and shelled the Brown, White, and Green Beaches in the two days leading up to the landings. The convoy finally arrived at the main channel between Labuan Island and Brunei Bluff just before sunrise on June 10, fully prepared to execute the invasion. Opposing them, General Baba’s 37th Army had assembled General Nozaki’s depleted 56th Independent Mixed Brigade in the Brunei Bay sector. This included two battalions near Brunei, one at Beaufort, and one garrisoning Labuan. Additionally, the 553rd Independent Battalion was stationed in the Miri area; however, none of these units were equipped to make a stand at the beaches. At 08:15, Barbey’s warships commenced a bombardment of the southern beaches as the troops were loading onto the landing vessels. Shortly after 09:05, the first waves began to advance, preceded by craft firing rockets and artillery. As anticipated, there was no opposition on the landing areas. The 2/15th Battalion successfully reached the shore at 09:15, followed by the 2/17th Battalion, which made landfall three minutes later, approximately 1,000 yards east of its intended location. By dusk, the 2/15th had scoured the swampy terrain of Muara Island and reported no Japanese presence. The 2/17th pushed forward a few miles along the road to Brunei, while the 2/13th Battalion landed and moved into reserve behind the 2/17th. Meanwhile, the 2/28th Battalion landed without incident at 09:15 and quickly secured Labuan town, with the 2/43rd Battalion following ashore at 09:20 to initiate the advance toward the airfield.
There was no opposition until 10:45, when the leading troops came under rifle fire just south of Flagstaff Hill. This post was quickly bypassed and taken, but the Australians continued to face strong resistance from the 371st Independent Battalion. Despite this, the defenders could not prevent the 2/43rd from capturing the airfield by nightfall. During the day, Porter also landed the 2/11th Commando Squadron on the unoccupied Hamilton Peninsula, with one troop initiating a move north along Charlie Track. On June 11, while the 2/43rd patrolled north and west, overcoming some opposition, the 2/28th slowly advanced toward the Able and Baker routes, where they encountered the bulk of enemy resistance. Meanwhile, after repelling an enemy patrol overnight, the 2/17th continued its advance to Brunei unopposed, with a company from the 2/15th moving up the Brunei River to land about four miles downstream from the town. The following day, the 2/17th reached and seized the airstrip, finally encountering defenses manned by the 366th Independent Battalion. On Labuan, the 2/43rd moved unopposed to Hamilton Road and successfully linked up with the commandos, leaving behind one company and three tanks to destroy a bypassed stronghold to the northwest. At the same time, the 2/28th probed the strongly held area astride MacArthur Road and to its west, making good progress to compress the resilient enemy into a pocket. On June 13, although the 2/43rd occupied an emergency airstrip at Timbalai, the primary objective remained to continue compressing the enemy into "the Pocket" and mop up the remainder of the island.
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Australian troops, under Brigadier Whitehead, landed on Tarakan, swiftly overcoming Japanese strongholds. By May 20, they began the North Borneo Offensive, achieving significant territorial gains amid brutal combat. As Japanese forces faltered, some surrendered, signaling a turning tide. The campaign showcased immense courage and sacrifice, with heavy casualties on both sides, ultimately paving the way for Allied victories in the Pacific theater.
