Last time we spoke about operation forager and the Changsha-Hengyang campaign. On Saipan, General Holland Smith's forces advanced with the 4th Marine Division targeting Hill 600 and the 2nd Marine Division capturing Mounts Tipo Pale and Tapotchau. The 27th Division supported these efforts, encountering resistance and challenging terrain. Meanwhile, the 27th Division, under new leadership, made progress despite difficulties. Concurrently, Japanese forces initiated a three-pronged assault in...
Last time we spoke about operation forager and the Changsha-Hengyang campaign. On Saipan, General Holland Smith's forces advanced with the 4th Marine Division targeting Hill 600 and the 2nd Marine Division capturing Mounts Tipo Pale and Tapotchau. The 27th Division supported these efforts, encountering resistance and challenging terrain. Meanwhile, the 27th Division, under new leadership, made progress despite difficulties. Concurrently, Japanese forces initiated a three-pronged assault in Hunan, capturing significant territory despite supply challenges and heavy rain. On June 11, the 40th Division took control of Yiyang while the 34th Division moved toward Yuelu Mountain. The 68th and 116th bypassed Changsha towards Guanqiao, with the 3rd and 13th facing resistance near Liuyang, which fell on June 14. Xue Yue retreated to Liling as Chinese defenses crumbled. Concurrently, the U.S. initiated Operation Matterhorn, targeting Japan's industrial sites. Despite challenges, the initial bombing runs prompted further strategic bombings, marking a significant phase in the Pacific War.
This episode is the Fall of Saipan
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 last saw, the Americans had begun their advance into Central Saipan. They achieved significant success on the right with the 4th Marine Division, but faced difficulties breaking through on the left and center. Following the victory in the Philippine Sea, Admiral Turner successfully completed unloading operations, landing approximately 60,000 troops and 75,000 tons of supplies by June 26. To maintain air superiority, Admiral Mitscher conducted raids on the islands of Pagan, Tinian, Guam, Rota, and Iwo Jima, and continued these raids over the next few days, despite ongoing Japanese night air attacks against the American beachhead.
In a strategic effort to keep the Japanese unsettled and unable to prepare for counterattacks, Carrier Task Group One raided Pagan Island on June 23rd. The neighboring islands in the Marianas were also not ignored; almost daily photo reconnaissance missions were conducted over Guam and Tinian to monitor any changes in their situation or positions before the landings. On June 25, Carrier Task Group Three carried out intense bombing raids on Guam and Rota to further incapacitate the airfields and installations there.
The first significant naval raid following the battle, beyond routine operations, was an attempted strike against the Volcano-Bonin group, which escalated into a substantial air battle initiated by the Japanese. At 6:00 on June 24th, Vice Admiral Joseph J. Clark's Task Group 58.1, comprising the Hornet, Yorktown, and Bataan launched a long-range fighter sweep of 48 Hellcats against Iwo Jima, which was intercepted by numerous enemy fighters. In the ensuing battle, four U.S. Hellcats were lost, while Japanese losses were estimated at 68 fighters and bombers. Despite this defeat, the Japanese attempted another attack against Clark's task group with the remnants of their local air force. This attempt ended disastrously for them, as U.S. interceptors shot down an additional 46 aircraft, bringing the day's total to 114. Task Group 58.1, having completed its mission without bombing the airfields, safely returned to Eniwetok without incident.
On the opposing side, after the fall of Mount Tapotchau, General Saito organized a final line of resistance between Tanapag, Radar Hill, and Tarahoho. In a brief resume on the morning of 27th June, Major General Igeta summarized the situation: “The summit of Tapotchau was occupied yesterday evening. Front line units tried to retake it with a night attack, but did not succeed as planned. In Donnay the enemy broke through with a number of tanks, but their advance was slow. Thereafter, no great change in the situation. The defense force, along with the firmest possible defense of its present front line and its activities toward annihilation of the enemy, is at present setting up with a line between Tanapag--Hill 221 (Radar Hill)--Tarahoho as the final line of resistance… Meanwhile, about 50 men of the 118th Infantry are improving their positions on the east side of Hill 343, and one company of the 136th Infantry is improving its position on Hill 268, and about 50 men of the 118 Infantry are digging in on the north side of that hill. The main body of the 9th Expeditionary Force, about 200 men, and about 100 men from the 9th Tank Regiment are consolidating their positions north and east of there in the high ground (Chacha water area).”Although the pre-landing preparations had been largely ineffective, continuous naval bombardment during the battle forced his troops to stay low and defend under intense pressure.
For the June 27 attack, General Smith ordered the three divisions to advance side by side and capture the O-6 Line. On General Schmidt’s front, progress was swift. The 23rd Marines advanced quickly, facing only sporadic rifle fire from the villages of Donnay and Hashigoru, and reached their objective. Meanwhile, the 165th Regiment moved rapidly through the hills but struggled to maintain contact, requiring the deployment of a battalion from the 24th Marines to fill the gap and repel an enemy tank attack. In the center, the 106th Regiment encircled Hell’s Pocket and established a cordon at the north end of Death Valley, although they made little progress against Hill Able. To the left, General Watson’s Marines advanced about 200 yards along Mount Tapotchau's western slopes while the division realigned its lines.
Despite largely ineffective pre-landing preparations, the continuous naval bombardment during the battle forced enemy troops to stay under cover and defend under intense pressure. In General Saito’s words “The practical experiences of the defense forces of Saipan… have to do with the power of the enemy naval bombardment. If there just were no naval gunfire, we feel with determination that we could fight it out with the enemy in a decisive battle.” Underwater mines, which the Japanese had used as land mines, were found along the road and railroad in the vicinity of Donnay. Tanks detoured these mined areas without difficulty, however. A Japanese supply dump, found near Hashigoru, contained new clothing, ammunition, and infantry weapons. Lieutenant Colonel Dillon's 2nd Battalion, moving through the matted vegetation and ragged cliff line along the coast, experienced difficulty keeping abreast of the faster-moving 3d Battalion. Since a detailed search of the gnarled coast line could not be instituted without sacrificing the momentum of the attack, Colonel Jones ordered the 1st Battalion to follow Dillon's unit at 400 yards, mopping up and investigating suspicious areas. By 4:40pm the 23rd Marines had trudged to objective O-6. Both battalions immediately dispatched security-reconnaissance patrols to their front but made no contacts with the enemy.
The next day, Major-General George Griner arrived to assume command of the 27th Division, immediately reorganizing his units and deploying the reserve 3rd Battalion, 105th Regiment. The 3rd Battalion, 106th Regiment had suffered heavy casualties in its Death Valley fight. By June 28 its effective strength of riflemen numbered approximately 100, and it was reorganized into a single rifle company. Among the 3rd Battalion's casualties on June 28 was the commanding officer, Lieutenant Colonel Harold I. Mizony, USA, killed in action when two Japanese tanks unexpectedly appeared just forward of his battalion observation post. By chance, the two enemy vehicles had found a lucrative target; commanders of the 2nd and 3rd Battalions, together with their company commanders, were gathered to plan the next move. Tightly grouped a short distance behind them were the men of the two battalions, waiting for the orders that would send them into action. Within a matter of moments the enemy tankers reaped an awful harvest, including 12 killed and 61 wounded, and then disappeared unscathed.
On General Watson’s front, Major Hunt's 2nd Battalion continued to fight across the open canefield toward its objective, a low ridge line north of Tipo Pale. Japanese riflemen and machine gunners, secure in their hillside grotto, raked the clearing with grazing fire. Light flame-thrower and medium tanks were available to the 6th Marines, but their use in this instance was limited because of difficult routes of approach to enemy positions, and support had to be delivered from long ranges. This left the task to the infantrymen. As everywhere demonstrated, reduction of cave positions proved a slow, painful job. By late afternoon the situation had improved slightly and the volume of Japanese fire had diminished somewhat, but the 2nd Battalion's unceasing efforts since 6:30 found it still short of the ridge line objective and very tired. A great store of energy had been burned in moving across the murderous field, yet more effort would be required. It appeared that the Japanese were rooted to the pock-marked ridge line. The Tipo Pale strong point, at which Company K, 6th Marines, had been whittling for many days, finally was secured on 28 June, permitting the company to rejoin its battalion. The tenacious Japanese soldiers in this pocket had sold their lives but had exacted from the 6th Marines a high price in time, men and effort.
The 8th Marines encountered tough Japanese resistance and difficult terrain while advancing against four small hills known as the Pimples, achieving minimal progress. Meanwhile, Schmidt, positioned well behind the 27th Division, received orders to maintain current positions. However, the 23rd Regiment conducted patrols beyond its lines up to 500 yards, and the 165th Regiment secured Hill 700 to complete the movement to the O-6 Line. Over the following two days, combat fatigue and the need for the 27th Division to catch up slowed the Marine divisions almost to a halt. Beginning their attack at 11:00 on June 29, the 3rd Battalion, 105th Regiment successfully closed the gap on Griner’s right flank by about 800 yards, eventually linking up with the 24th Marines the next day. On the left, the 106th Regiment encountered heavy resistance but eventually captured Death Valley and Hell’s Pocket, establishing contact with the 8th Marines by June 30. Behind them, the 2nd Battalion, 165th Regiment secured Hill Able and the remaining portion of Purple Heart Ridge. Meanwhile, the Marines and the 165th Regiment conducted patrols, cleared out remaining enemy forces, and fortified their positions. The 6th and 8th Marines also made some limited progress northward, culminating in the capture of Bill’s Pimple.
During the night of June 30, the Japanese commenced their withdrawal towards Saito’s final defensive line in an organized manner despite facing artillery fire. This new defensive line, though shorter, provided an opportunity for Saito to regroup his troops and strengthen their defense. However, failure to hold this position would spell disaster for him and his soldiers. Upon learning of the Japanese retreat, the American forces resumed their offensive on July 1, encountering stubborn resistance from remaining Japanese pockets that needed to be cleared out. The following day, General Smith's forces launched a coordinated attack. On the left flank, Colonel Stuart’s 2nd Marines swiftly advanced through Garapan, Flametree, and Sugarloaf Hills, while the 6th Marines made significant gains after neutralizing an enemy stronghold. The 8th Marines, after securing the Pimples, faced heavy Japanese resistance at Limestone Hill. In the meantime, evacuation of casualties had become a problem: Marines had fallen on the open field, and all attempts to rescue them only resulted in more men being hit. The scheme finally adopted, and the one which brought success, was for a tank to position itself between the casualty and the limestone hill. By following directly behind the tanks, hospital corpsmen could then move safely to the wounded, apply hasty bandages, give them a shot of morphine, and place them on stretchers. Then, carefully coordinating their moves with the tank by talking to the driver through the sound-powered phone on the rear sponson, the stretcher bearers would precede the tank from the site, all the while shielded from Japanese fire. White phosphorous rounds dropped on the hill by the 81mm mortar platoon plus frontal blasts from the chaperoning medium tanks also contributed to the success of this resourceful project. The fact that only small arms fire spattered against the thick hulls of the tanks indicated that the Japanese had no heavier weapons readily available in the limestone hill. By dark, all wounded had been rescued, but the task of seizing the hill still remained.
Only a clever night tank raid, utilizing illuminating shells and flamethrower tanks, could eliminate this stubborn Japanese position. In the center, the 106th Regiment advanced despite sporadic fire, while the 105th Regiment had to overcome the Papako strongpoint to make modest gains. With the arrival of the 27th Division at the O-6 Line, the right units could resume their advance. Consequently, the 165th Regiment encountered minimal opposition, advancing 1700 yards, while the 23rd and 24th Marines made virtually unopposed progress to the intermediate O-6A Line.
On June 3, the general offensive persisted, now targeting the O-7 Line. On the front under Watson's command, the 2nd Marines successfully took control of the remaining portions of Garapan, though they encountered difficulty clearing Mutcho Point on the town's northwestern edge. Duty in the town had little to commend it; battered skeletons of what had once been buildings, and humans, and animals, dotted the area; the choking smell of death hung about like a fog. And everywhere were the pieces of corrugated iron which the Japanese and natives had used as roofing for almost every structure from the hen house to the bank. To step on one of these huge rattling sheets was to inform everyone thereabouts of one's presence. Garapan's trash and garbage dump appearance was further enhanced by odd clothing, shoes, papers, books, and miscellaneous bric-a-brac strewn through the area. Perhaps the only bright point was the copious wells, providing adequate water for the 2nd Marines to bathe away some of the filth on their bodies.
The 6th Marines also advanced, halting 1000 yards from the coast, while the 8th Marines faced minimal resistance and gained approximately 1000 yards. Meanwhile, Schmidt's three regiments advanced side by side and in formation, making swift progress over challenging terrain but were ultimately halted before Hill 721 and 4th of July Hill. Nonetheless, the 24th Marines managed to capture Radar Hill, situated at the center of Saito’s final defensive line.
In the central area, Japanese delaying units hindered the 27th Division's progress towards the coast, with the 106th advancing another 1000 yards and the 165th about 500 yards. During the night of July 3rd the 165th Infantry command post became the scene of violent activity when 27 Japanese advanced into the installation, apparently by mistake. All of the Japanese intruders were killed with no loss to personnel of the 165th. In the morning, when an identification could be made, Colonel Ogawa Yukimatsu, commander of the Japanese 136th Infantry, was discovered among the dead. Piecing the story together, it appears that Ogawa and his headquarters group had been by-passed by U. S. advance and that he was attempting to displace to the northeast when he blundered into the 165th's command post. Detailed instructions pertaining to the establishment of Saito’s final line of defense were found on his body, providing the Americans with valuable intelligence for future operations.
The next morning, Griner’s forces continued their northward advance, successfully securing Flores Point and the surrounding high ground. To the right, despite a disappointing artillery barrage, Schmidt's Marines swiftly captured Hill 721 and 4th of July Hill, with a bold patrol securing Hill 767 to the northeast. On the left flank, while the 2nd Marines cleared Mutcho Point and Tanapag Harbor, the 6th and 8th Marines rapidly pushed to the coast, reaching the O-7 Line.
Watson's involvement in the offensive came to an end, with subsequent shifts in the axis of attack by the 27th Division and the 4th Marine Division towards the northeast.
Mindful of the significance of the day in American history and pleased with progress at Saipan, General Holland Smith distributed the following message to the landing force on the evening of July 4th: “The Commanding General takes pride on this INDEPENDENCE DAY in sending his best wishes to the fighting men on Saipan. Your unflagging gallantry and devotion to duty have been worthy of the highest praise of our country. It is fitting that on this 4th of July you should be extremely proud of your achievements. Your fight is no less important than that waged by our forefathers who gave us the liberty and freedom we have long enjoyed. Your deeds to maintain these principles will not be forgotten. To all hands a sincere well done. My confidence in your ability is unbounded.” The entire northern part of the island remained to be seized, including the important Marpi Point area; and this demanded a swing of the axis of attack to the northeast. Holland Smith, therefore, split the unconquered portion in half, assigning the left segment to the 27th Division and the right to the 4th Division. To allow sufficient time for the juggling of frontages and zones, the attack hour was delayed until noon of 5 July. Generals Griner and Schmidt, of the 27th and 4th Divisions respectively, were to "conduct such adjustment of their lines or make minor attacks prior to King-hour as they [deemed] necessary to launch a coordinated attack. . . ." The 4th Division's thrust had pushed well into the newly-assigned zone of the 27th Division, so that the previously described reliefs and shifts were necessary.
The Japanese forces remaining in the upper end of the island were poorly equipped, supplied, and often in poor health, yet they maintained high morale and a readiness to fight to the end. In the final push northward, Griner assumed control of the western front on June 25th. However, the advancement of his 105th and 165th Regiments was hindered by difficult terrain and strong resistance from fortified positions around Harakiri Gulch. On the right flank, the 24th and 25th Marines made successful progress to the O-8A Line after the 23rd Marines secured the intermediate O-7Z Line. Despite concerns of a potential Japanese counterattack during the night, accurate artillery fire dispersed enemy concentrations. The following day, Griner aimed to reach Makunsha by midday, but faced slow progress against obstacles like Harakiri Gulch and along the coastline. Consequently, Smith decided to adjust division boundaries, allowing Schmidt’s Marines to expand northwestward, envelop the 27th Division north of Makunsha, and assume responsibility for the entire front for the sweep to Marpi Point. Under this revised plan, the 27th Division resumed its assault in the afternoon, breaking through a coastal ditch but encountering resistance at the Gulch. Meanwhile, the 23rd Marines, on Schmidt's front, pushed northwest and northeast, with limited progress towards Makunsha. The 24th Marines gained approximately 1800 yards, and the 25th Marines secured Mount Petosukara, where 800 civilians surrendered.
Overnight, attempts to counterattack against Petosukara were swiftly thwarted, but significant action unfolded in the Makunsha region. For the 3rd Battalion, 24th Marines, stationed to protect the regiment's exposed left flank, the action was particularly vicious. Just before dawn the enemy rushed forward, armed with grenades and "idiot sticks," encouraging themselves with loud shouts and screams. Though this thrust failed to penetrate the Marines' lines, some of the enemy fell within five yards of the foremost foxholes. The action report of the 3d Battalion, 24th Marines, estimated the number of enemy killed in this attack at "more than 200."
On July 6, facing the complete breach of his last line of defense and with no options left, Saito realized the futility of the situation. With his forces depleted of essential supplies and under relentless artillery barrage, he issued orders for the remaining troops to execute gyokusai, a final suicidal assault aimed at inflicting maximum damage on the enemy. Several days prior to Saito's final order the assembly of remaining Japanese forces had begun. Some Japanese were out of reach behind U. S. lines, others were hidden in the deep shadows of caves, but all available were mustered. Marpi Point, Paradise Valley and Harakiri Gulch were sites for mobilization and reorganization. Many provisional units were formed in an effort to achieve some degree of tactical unity among the assorted groups and individuals. Weapons and equipment were wanting and some Japanese were armed only with grenades or crudely-fashioned spears. One Japanese staff officer, Major Kiyoshi Yoshida who participated in the battle estimated the total participants at 1,500, many with no weapons. In the light of subsequent events, however, his estimate appears too low. Assuming that he was misinformed on this point, it is not at all surprising; even at the assembly points, U. S. artillery and mortar fire hampered Japanese efforts to organize their troops and an accurate count was impossible. As the conglomerate force moved toward Makunsha, which would serve as a point of departure, it was subjected to persistent, heavy concentrations of artillery fire. This resulted in a limping approach with leaders calling upon every conceivable device to maintain the unity of their commands. Greater silence by the sprawling force would have helped; early in the evening patrols from the 27th Division Reconnaissance Troop had detected unusual activity. This had resulted in the large number of unobserved fire concentrations thrown into the Makunsha vicinity. By nightfall, Generals Saito and Igeta, along with Admiral Nagumo, performed seppuku after a final meal, while Colonel Suzuki Takuji gathered 3000 Japanese fighters, including naval and support personnel, unarmed civilians, and the injured, for a final desperate charge.
The blow fell at 4:45am. First and hardest struck were the isolated positions held by the 1st and 2nd Battalions, 105th Infantry. The attack on these units hit from front, flank and, after moving through the gap, the rear. Almost as soon as the attack was launched, communications to the rear were cut. It was then simply a matter of two isolated battalions of soldiers fighting for their lives. This they did and did well. Some of the soldiers stacked so many dead Japanese forward of their positions that it was necessary to move to get fields of fire. Major McCarthy, commanding the 2d Battalion, described the onslaught: “It reminded me of one of those old cattle stampede scenes of the movies. The camera is in a hole in the ground and you see the herd coming and then they leap up and over you and are gone. Only the Japs just kept coming and coming. I didn't think they'd ever stop.” The sheer weight of this attack, its ponderous momentum, carried it through the soldiers' lines. In addition, hundreds of Japanese moved past the isolated defense area, using the gap on the right. The fanatical surge then carried to the 3rd Battalion, 105th Infantry, located on the high ground overlooking Harakiri Gulch. Here the soldiers were on better defensive terrain; the Japanese had to climb up to them. The lines held, and the Japanese suffered staggering losses. This portion of the battle did not cease with the coming of daylight on 7th July but continued until midafternoon. Next to feel the impetus of the determined thrust was the 3d Battalion, 10th Marines, in firing positions about 500 yards southwest of Tanapag Village. The Japanese mass that struck this unit was apparently that portion of the banzai force which had moved through the gap between the 1st and 3rd Battalions, 105th Infantry. Hardest hit were Batteries H and Headquarters and Service, in position on the left of the railroad track. Batteries I and G, set up on the right of the track also got into the fight, although they were not as closely engaged as the other two. The only battery that actually fired its howitzers during the melee was H, the others being forced to remain silent by the presence of other artillerymen to their front. During the early phases of the battle, before Battery H was forced to abandon its firing positions, one of its howitzers was turned completely around to engage a Japanese medium tank which had ploughed through to the rear. At a range of less than 50 yards the artillerymen sent 105mm shells crashing into, and destroying, their armored target. Eventually, however, the pressure from Japanese infantrymen was too great; Battery H's outnumbered survivors pulled back. In the frantic confusion and haste of the retreat, they failed to remove the breech blocks or firing locks from the howitzers. The Japanese, oddly enough, neither used nor destroyed the weapons while they had control of the area. Battery I had been attacked at 0455, with Japanese advancing astride the railroad track. The first thrust was repulsed and the Japanese fell back to reorganize. A series of actions, followed this same pattern, continued until 0650, when all of the battery's small-arms ammunition was expended. At this time the battery commander, Captain John M. Allen ordered the firing locks removed from the howitzers and the unit to fall back to the positions of Battery G. Here the two batteries continued the fight until relieved by elements of the 106th Infantry later in the day. Located directly behind Battery H, headquarters and service personnel of the battalion were forced to retire after heavy, close-in fighting. Among the 136 casualties in the battalion was the commanding officer, Major William L. Crouch, who was killed. Japanese killed in the encounter numbered 322. Even as the Japanese surged directly against the 3rd Battalion, brother artillerymen of the 4th Battalion, 10th Marines, in position to the southeast, received pressure from the fringe of the main enemy tide. In defense of its firing positions, the battalion killed about 85 Japanese. Despite the turmoil of the banzai attack, the 4th Battalion responded on the morning of 7 July to an urgent request for support originated by the 23d Marines, fighting down the cliffs above Makunsha.
By 05:30, they had advanced further, reaching the command post of the 105th Regiment, where Bishop's hastily assembled American forces, aided by artillery, managed to repel the attack. Concurrently, secondary assaults were launched in Paradise Valley and Harakiri Gulch but were promptly quelled by American firepower. By midday, the banzai charge had been effectively halted, and the few surviving Japanese soldiers retreated to Mamushka, engaging in sporadic skirmishes with American troops throughout the day. Despite a counterattack by the 106th Regiment, they were forced to halt just 200 yards short of the Tanapag perimeter, and by midnight, the remaining American survivors were successfully evacuated.
During this engagement, the 105th incurred 406 fatalities and 512 injuries, while Marine artillery units sustained 45 deaths and 82 injuries. On July 8, at 04:30, the remaining Japanese forces launched another attack on the 106th's positions, only to be swiftly repelled. Against the coastal portion of this line the Japanese executed a vigorous thrust during the night of July 7th. Though the strength, organization and planning of this second attack were weak by comparison with the previous effort, the vigor and determination with which it was executed did not vary. Shortly after midnight a report came from the observation post atop Hill 767; Japanese force moving south. Enemy "feeler" patrols probing for weak spots were engaged as early as 3:00am, but the information that they took back to their commanders must not have been encouraging. No holes existed. The attack, launched about 4:30am, struck the 1st Battalion, 106th Infantry, along the beach. Grazing defensive fires swept across the flat beach like a scythe, cutting all in its path. The Japanese never seriously threatened penetration of the lines and those that attempted to swim around the flank were spotted and killed. Shortly after 7:00am the Japanese attack petered out and died. The 106th Infantry estimated that it had slaughtered about 1,000 of the enemy, while at the same time its own losses were practically negligible.
Watson's Marines then assumed control over most Army units and conducted cleanup operations for the ensuing two days. They discovered a total of 4,311 Japanese casualties, including those inflicted earlier by artillery and naval bombardment. Meanwhile, Schmidt's regiments, supported by the 2nd Marines, faced resistance as they advanced northeast and northwest. The NTLF Operation Order for 8 July instructed the 2d Marine Division, less detachments, to "advance in the present 27th Infantry Division zone of action, pass through elements of [that] division on its front line, attack, mop up and destroy enemy elements. . . . Upon passing through the 27th Infantry Division assume operational control 165th Infantry and 3d Battalion, 6th Marines, . . . assume tactical control within the assigned zone of action at 0630 [8 July]." Upon passage of its lines the 27th Division would revert to NTLF reserve. No effective resistance was offered the 2nd Marine Division after it had passed through the 27th Division on the morning of 8 July, although large numbers of poorly armed and totally disorganized enemy were encountered. Some Japanese used the familiar device of hiding in caves and firing from the deep shadows, but the bulk seemed eager to die and made headlong rushes at the Marines. This foolish expenditure simplified the mop-up. The 6th Marines' action report characterized the day's activities as an "attack . . . against a disorganized, swarming mass of Japs . . . waiting for the final death blow. . . ." Adding the hundreds found strewn through its zone to the number that it disposed of, the 6th Marines made a "conservative estimate" for 8 July of 1,500 dead Japanese in its area. On more rugged terrain inland the 8th Marines encountered much the same type of resistance. Here, with more caves to investigate, the sweep was somewhat slower. One wooded pocket encountered, a deep ravine, caused a minor delay. The tactic that previously had worked so well was again employed: one company stayed behind to contain and mop-up while the rest continued the push. The 8th Marines' zone, being inland of the main path of the banzai attack, contained fewer enemy bodies; but, even so, there was conclusive evidence that a terrific battle had taken place.With this final push, Turner declared the island secured, although General Jarman's garrison troops continued mop-up operations for several months.
Following the declaration that the island was secured, efforts to induce cave-occupants to surrender were intensified. Interpreters, using public address systems, pleaded with people in caves to come out. The device was not only attempted from land but from sea as well. LCI gunboats moved close inshore and broadcast promises of good treatment, for which they were answered with fire from Japanese soldiers in the caves. Even some of Saipan's leading citizens, who had surrendered and received good treatment, talked to those in the caves, urging them to yield. But, for the effort expended, the results were not encouraging. The primary reason for this failure was that the people had been saturated with Japanese propaganda to the effect that the Americans intended to torture and kill them. This had been repeated so often that the people came to believe it. At this time the very zenith of horror occurred. Hundreds of civilians, believing that the end had come, embarked on a ghastly exhibition of self-destruction. Casting their children ahead of them, or embracing them in death, parents flung themselves from the cliffs onto the jagged rocks below. The places they jumped from would become known as "Suicide Cliff" and "Banzai Cliff". Some waded into the surf to drown or employed other gruesome means of destroying themselves. How many civilians died in this orgy of mass hysteria is not known, but it is estimated that around 1000 committed suicide. A commander of a patrol craft (YP) said that the progress of his boat around Marpi Point at this time was slow and tedious because of the hundreds of corpses floating in the water.
On July 13, Colonel Riseley's 3rd Battalion executed the last Marine operation on Saipan, successfully assaulting Maniagassa Island, resulting in 14 Japanese deaths and the capture of 15 others. By the end of the battle, almost the entire Japanese garrison of approximately 28,000 personnel had been eliminated. About 1,700 were taken prisoner, including roughly half who were Korean laborers. Nearly 10,000 Saipan civilians, roughly 40% of the population, perished, with another 14,000 interned. American forces suffered approximately 16,500 casualties, comprising 3,100 fatalities and 13,000 wounded out of a total assault force of 71,000. This casualty rate, exceeding 20%, was comparable to Tarawa and marked the costliest battle for the Americans in the Pacific theater up to that point. That is all for today with Saipan as we now need to head over to New Guinea.
General MacArthur’s next offensive was to be the invasion of Noemfoor Island, codenamed Operation Cyclone. Noemfoor served as a crucial staging ground for Japanese forces destined to reinforce the Biak Detachment, owing mainly to its possession of two vital airfields. Despite being guarded by a modest contingent, primarily consisting of six infantry companies from Colonel Shimizu Suesada’s 219th Regiment, the Japanese presence on the island was scattered, rendering their defense disorganized. Allied estimates of Japanese strength on Noemfoor were too high, for there were not more than 2,000 Japanese on the island. Probably not more than 900 of these could be counted infantry effectives. In addition to the 2,000 Japanese, there were 600-odd Formosan laborers and approximately 500 Javanese slave laborers. The 3d Battalion, 219th Infantry, contained the bulk of the combat troops, but there were also present about 180 men of the 2d Battalion, 219th Infantry, and a like number of the 222d Infantry, 36th Division, troops which had been unable to reach Biak. The Japanese garrison on Noemfoor was commanded by a Colonel Shimizu, who was also the commanding officer of the 219th Infantry. Another unit, commanded by a Major Mori, but apparently under Colonel Shimizu's operational control, seems to have been a provisional organization containing mostly armed service personnel and numbering about 600 men.
General Krueger, anticipating minimal resistance, tasked Colonel Sandlin’s 158th Regiment with Operation Cyclone, overseen by General Patrick. The assault was to be facilitated by Admiral Fechteler’s Task Force 77, supported by cruisers under Admiral Berkey and aircraft from the 5th and 13th Air Forces, which had been conducting preparatory bombings on Noemfoor and enemy air bases in the Vogelkop Peninsula. Patrick's strategy involved landing on Yellow Beach, where the enemy's defenses were perceived to be strongest, aiming for swift American control over Noemfoor's airfields. In many essentials, the landing plans for Noemfoor were very similar to those used at Biak; but in one major essential the Noemfoor landing plan differed radically from that employed at Biak. At the latter island the HURRICANE Task Force had used a beach which, while within easy marching distance of the principal objectives and the main concentration of enemy troops, was relatively undefended. But at Noemfoor, the landing was to be made in the face of the enemy's strongest defenses, known to be located in the Kamiri Drome area. YELLOW Beach, as the landing area was designated, extended approximately 800 yards along the western end of the airfield, which was situated almost at the high water mark. The reef presented fewer hazards there than elsewhere, since it was somewhat narrower than at most other points along the island's coast. The relative narrowness of the reef at Kamiri would also permit LCIs, LCTs, LCMs and LSTs to approach to within 450 yards of the beach, which was believed to be firm at the airfield. Moreover, landing at YELLOW Beach had the advantage of placing the assault troops immediately on their objective, permitting a rapid seizure of Kamiri Drome before the Japanese could recover from the shock of the naval and air bombardments. Enemy forces on the island would be split, and those stationed at Namber and Kornasoren Dromes would be isolated. To minimize casualties during the assault, the landing plan required the most intense naval bombardment witnessed in the Southwest Pacific Area thus far. Additionally, Krueger kept the 503rd Parachute Regiment on standby at Hollandia for airdrop once a suitable landing zone was secured, with the 34th Regiment stationed at Biak in reserve.
With all preparations finalized by the end of June, Fectheler’s unit set off from Toem at 18:00 on June 30, reaching southeastern Biak around 17:40 the following day. Subsequently, the American forces sailed towards Noemfoor, commencing deployment off Yellow Beach by 05:00 on July 2. Prior to the landings, the island had endured significant bombardment from General Kenney’s aircraft the previous day, with additional air assaults conducted leading up to the arrival of the troops. As the soldiers readied for the shoreline assault, Berkey’s cruisers and Fechteler’s destroyers bombarded Yellow Beach and its surroundings for approximately 50 minutes. Immediately before the landing, air bombardment, like much of the naval gunfire, was directed against the low coral ridges and hills behind Kamiri Drome. It was believed that the most determined enemy opposition would come from positions in these ridges, and to neutralize these possible defenses the 33 B-24's, at approximately H minus 15 minutes, dropped 500-pound bombs along the ridge lines.
The intensity of the Allied air and naval bombardment effectively dispersed most of the Japanese forces from the beach or kept those remaining pinned down. With the cessation of bombing, the initial wave of troop-carrying LVT's approached the outer edge of the reef, supported by rocket fire from LCI gunboats. Encountering no resistance, Sandlin’s 1st and 2nd Battalions disembarked near a coral ledge overlooking Kamiri Drome. The American forces then commenced advancement in the west, east, and south directions to expand the beachhead, facing only minor resistance from caves approximately 500 yards from the eastern end of Kamiri Drome. Simultaneously, Sandlin’s 3rd Battalion landed and swiftly joined mop-up operations at the east end of the airstrip, enabling the 2nd Battalion to turn southward towards the Kamiri River without encountering opposition along the way.
By 4:00, the 158th had successfully secured a rectangular area approximately 3000 yards wide and around 800 yards deep, reaching south to the banks of the Kamiri River. Despite enemy mortar fire, unloading operations had progressed well, with over 7100 men, 500 vehicles, and 2250 tons of supplies successfully brought ashore by evening. American casualties for the day were limited to 3 killed, 19 wounded, and 2 injured, while the Japanese suffered 115 dead and 3 captured. In anticipation of potential Japanese resistance elsewhere, Patrick had requested reinforcements, leading Krueger to order Colonel George Jones’ 503rd Parachute Regiment to advance to Kamiri. On July 3 around 05:15, regimental headquarters and the 1st Battalion began loading onto 38 C-47s at Cyclops Drome, with plans for the other two battalions to drop over the following days. Launching was completed by 07:47, with successful arrival over Noemfoor at 10:00. The leading C-47's paratroopers were on the ground just ten minutes later.
The planes were to fly over Kamiri Drome in flights of two each, the first plane at a height of 400 feet and the second echeloned slightly to the right rear at 450 feet. Subsequent flights were to follow at a distance of 300 yards. Contrary to plans, the first two C-47s flew over the strip at a height of about 175 feet, and the next eight planes all flew below 400 feet. Dropping from this low altitude caused the paratroopers in the first ten C-47s to suffer many casualties; more casualties resulted because the planes flew over the strip two abreast. The broad formation caused many paratroopers to land off the southern edge of the 100-foot-wide runway in an area where Allied vehicles, bulldozers, supply dumps, and wrecked Japanese aircraft were located. Additional hazards beyond the cleared area were jagged tree stumps, trees partially destroyed by pre-assault air and naval bombardments, and a number of anti-aircraft gun emplacements. The drop resulted in 72 casualties among the 739 men dropped on July 3, including 31 severe fracture cases, many of whom would not be able to parachute again. Despite these challenges, Jones’s 1st Battalion took control of approximately 2000 yards in the center of the defenses around Kamiri Drome upon arrival, allowing Sandlin’s 2nd and 3rd Battalions to concentrate at the eastern end of the field and expand the perimeter. These battalions then proceeded eastward toward Kornasoren Drome, encountering well-prepared but unmanned defensive positions. Additionally, the 1st Battalion conducted patrols south of the Kamiri River but encountered only a few scattered enemy soldiers. The next day, Jones’ 3rd Battalion initiated their drop on Kamiri Drome. They encountered casualties, with 56 jump injuries among the 685 paratroopers who landed by 10:25. Given the significant injuries from both drops, Krueger and Patrick opted to transport his remaining battalion via water. They would arrive at Noemfoor by July 11. But for now, let's shift focus from Noemfoor to the Wakde-Sarmi area to discuss its final clean-up.
Following the main conflict's conclusion on June 25, General Sibert directed the 3rd Battalion, 1st Regiment and the 3rd Battalion, 63rd Regiment to clear Lone Tree Hill. By June 30, they successfully secured the area. On the same day, the 1st Battalion, 20th Regiment moved through the defile south of the hill and encountered only a few stragglers. Seeking to fully secure the Maffin Bay staging area, Sibert extended the perimeter to the Woske River on July 1 through the 1st Regiment's efforts. By July 4, elements of the 63rd occupied Hill 225, seizing the crest of Mount Saksin the following day. However, Hill 265, located southwest of Hill 225, presented greater challenges due to Japanese resistance and difficult terrain. Yet by July 9, the 1st Battalions of the 1st and 63rd Regiments secured the hill crest, previously held by elements of the 224th Regiment. With the capture of Hill 265, the last enemy stronghold in the Maffin Bay region fell. Meanwhile, General Tagami abandoned the idea of a decisive battle in the Woske sector, opting instead to withdraw the majority of his 36th Division toward Sarmi and Sawar, with remnants of the 224th Regiment assuming defense of Woske.
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The fall of Saipan pierced the Japanese inner defensive perimeter, now the home islands were vulnerable to strategic bombing. The battle claimed nearly 50,000 casualties and at least 8000 civilian deaths. The intense percentage of casualties suffered by the Americans would have a profound effect on future American planning for the Pacific War.
