Last time we spoke about Operation Hailstone, the continued drive upon Madang and the horrible massacre during the Indian Ocean Raid of 1944. Operation Hailstone saw what was once called the Gibraltar of the Pacific, Truk nearly annihilated. The demoralized and understrength Japanese could not hope to contest the air strikes and naval bombardment. Vice-Admiral Kobayashi Masami was held responsible for the defeat and was relieved of his command. Over on New Guinea the Australians were continuing...
Last time we spoke about Operation Hailstone, the continued drive upon Madang and the horrible massacre during the Indian Ocean Raid of 1944. Operation Hailstone saw what was once called the Gibraltar of the Pacific, Truk nearly annihilated. The demoralized and understrength Japanese could not hope to contest the air strikes and naval bombardment. Vice-Admiral Kobayashi Masami was held responsible for the defeat and was relieved of his command. Over on New Guinea the Australians were continuing their drive to Madang, killing and taking prisoner all the Japanese they could along the way. Then over in the Indian Ocean, Vice-Admiral Takasu Shiro unleashed a raid against allied shipping, a rarity for the Japanese. Unfortunately the raid devolved into a singular attack against the British steamer Behar. A needless and cruel massacre was performed aboard the Tone, killing 65 to a possible 100 people. Such actions would only see justice after the war.
This episode is the battle of Eniwetok
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.
Operation Flintlock was a huge success, Kwajalien was seized incredibly fast and the invasion of Majuro saw no Japanese even on the atoll. Because of this the allied war planners had to shuffle the schedule and thus was born Operation Hailstone and the invasion of Eniwetok. Eniwetok had been originally slabbed for May, but it seemed obvious the Japanese power in the Marshalls was crumbling a lot faster than anticipated. Consequently, Admiral Nimitz knew it would be necessary to capture the atoll to give shelter to all the ships he intended to deploy westward in the drive against the Japanese inner empire. Since it now seemed Brigadier-General Thomas Watson’s 8000 reserve troops of the 22nd Marines and the 106th Regiment would no longer be required, Admirals Spruance and Hill began preparing them for the invasion of Eniwetok.
The operation was codenamed Catchpole and the war planners would only have 12 days to prepare. Moving up the invasion of Eniwetok required stripping the new garrisons of Kwajalein Island and Roi-Namur of manpower and supplies. The landing boat crews were greens, not trained with the troops. General Watson reported “the infantry, amphibian tractors, amphibian tanks, tanks, aircraft, supporting naval ships, and most of the staffs concerned had never worked together before.” Nevertheless, the forces available for the operation would be plentiful and well equipped. Having gone through the horribly bloody assault on Tarawa, Admiral Hill was relieved to have a large number of amtracs. The Army’s 708th Provisional Amphibian Tractor Battalion would sail with 119 LVTs, most of which were the heavily armored newer models. As Hill would remark later “At Eniwetok, I felt like a millionaire, but at Tarawa, I was a pauper.”
Admiral Hill would have at his disposal 5 attack transports, 1 transport, 2 attack cargo ships, 1 cargo ship, 1 LSD, 2 APDs, 6 LCIs and 9 LSTs to carry General Watson’s Tactical Group 1, consisting of the 22nd marines and 106th regiment led by Colonel John Walker. Further support came in the form of 3 battleships, 3 heavy cruisers and 7 destroyers of Rear-Admiral Jesse Oldendorf’s task force 51.17; 3 escort carriers and 3 destroyers of Rear-Admiral Van Ragsdale task group 53.6; and Rear-Admiral Samuel Ginder’s carrier task force 58.4. The plan was to first land two scout companies; the Reconnaissance Company, V Amphibious Corps, against Camellia and Canna Islands southeast of Engebi; and the scout company D, 4th Marine Tank Battalion against Zinnia Island northwest of Engebi to prevent any escape of the enemy from Engebi in that direction. The scout would secure Camellia and Canna allowing the 2nd Separate Pack Howitzer Battalion with their 75-mm pack howitzers to deploy on Camellia, and the 104th Field Artillery Battalion with their 105-mm. howitzers to deploy on Canna. The artillery would then be used to support the next day's attack against Engebi. The job of hitting Engebi was given to the 1st and 2nd Battalions, 22nd Marines of Colonel John Walker. His 3rd Battalion would be kept in regimental reserve. The two battalions were to be supported by medium tanks of the 2nd Separate Tank Company, and a platoon from the Cannon Company, 106th Infantry, with two 105-mm, self-propelled guns. Lastly Colonel Russell Ayers’ 106th Regiment would hit Eniwetok Island; and once it was captured, the infantry would take Parry Island along with the 22nd Marines.
Defending against them would by General Nishida’s 1st amphibious brigade; organized from the 3rd Independent Garrison Unit. It had 3 1,036-man mobile battalions, a 76-man machine-cannon unit with 6 20mm guns, 66-man tank unit with 9 Type 95 light tanks, a 243-man engineer unit, a 139-man signal unit, and 190-man medical unit. The mobile battalions had a 103-man 1st Company while the other 2 had 197 men, plus a 155-man mortar company, a 121-man artillery company with 3 75mm mountain guns, 2 37mm anti-tank guns, and a 66-man engineer platoon. These units had recently been brought over alongside his HQ. 250 IJN personnel and 1115 troops were deployed on Parry, about 692 soldiers, 500 IJN personnel and 61 men of the 61st Guard Unit would Engebi; and only 779 troops under Lieutenant-Colonel Hashida Masahiro, commander of the 1st Mobile Battalion
would defend Eniwetok. In the 6 weeks following the Kwajalein assault, the Japanese had been constructing defenses on the lagoon side based on reports they received from the Kwajalein attack, yet there was not enough time to make much progress. The 3 defended islands of Eniwetok Atoll had no naval-manned defenses, other than two 120mm coast defense guns and two 13.2mm twin machine-guns on Engebi's north corner. 3 75mm and 28 20mm anti-aircraft guns had been delivered, but were not even emplaced. The 1st Amphibious Brigade arrived less than a month and a half before the American would land with barely any time to dig in. While significant construction materials had been delivered, there was not nearly enough time to make much progress. Defenses would be mainly dugouts, trenches, and foxholes. The brigade deployed its infantry weapons more or less equally. Engebi was expected to be the most heavily defended, but instead the most troops were actually on Parry.
On February 15th, Hill’s scout group sailed out from Kwajalein lagoon while Operation Hailstorm smashed Truk. Meanwhile Ginder’s carriers proceeded directly to Eniwetok and on February 16th launched a series of preliminary strikes. The strike completely destroyed all the buildings upon the atoll, neutralized her airfield and destroyed 14 aircraft on the ground. Naval bombardment of Engebi, Eniwetok, Parry and Japtan Islands began in the early morning hours of February 17, and was joined by more air strikes after dawn. Simultaneously, Hill’s force arrived off Eniwetok’s southeast coast. As the surface ship bombarded the islands, amtracs launched and landed by 1:30pm against Camellia and Canna. After securing Canna and Camellia by 2pm, the Reconnaissance Company landed, against no opposition, on the 3 islands northwest of Camellia and on 2 small unnamed islands west of Canna. These landings were made to offer security to the artillery units against possible Japanese infiltration during the night.
Hill then landed his 2 artillery battalion to support the invasion of Engebi. Engebi’s total weapon strength came to 2 flame throwers, 13 grenade dispatchers, 12 light machine guns, 4 heavy machine guns, 2 37-mm. guns, 1 50-mm. mortar, 11 81-mm. mortars, 1 20-mm. automatic gun, 2 20-mm. cannons, 2 mountain guns, 3 light tanks, and 2 12-cm. coast defense guns. Colonel Yano predicted that a heavy bombardment would precede the amphibious landings, he accordingly planned to concentrate his defensive system on the lagoon shore of this triangularly shaped island. The Japanese defenders were ordered to "...lure the enemy to the water's edge and then annihilate him with withering fire and continuous attacks." Most of the prepared defenses and over half of the brigade detachment were concentrated at the center of the lagoon shore. The approach to this strong point was flanked by the fire of 2 75-mm. mountain guns on the northwest corner and 2 20-mm. machine cannon in the southern part of the concentration itself, as well as 2 37-mm. guns emplaced on the southern tip. Frontal fire could be delivered by the 20-mm. automatic guns and the three tanks, each mounting 37-mm. guns.
Hill deployed UDT-1 frogmen to first clear obstacles and mines while D Company , 4th Tank Battalion secured Zinnia and 4 other islets west of Engebi in the early morning of February 18. At 6:55 Colorado and Louisville began shelling the northern and eastern part of Enegbi. Tennessee and Pennsylvania moved at dawn to deliver close-range destructive fire against beach defenses from flanking positions on each side of the boat lanes. At 7:20 destroyers, Phelps and Hall, moved into position as direct support ships, but because of the smoke and dust rising from the island, Hall was unable to fire. Just before 8:00 the naval guns ceased fire to allow a half-hour air strike to take place. This was completed ahead of schedule and naval fire was resumed at 8:11 and increased steadily in intensity until just before the first troops landed. Shortly after the air strike was lifted, artillery on Canna and Camellia joined the naval guns and began to fire on the beaches at maximum rate until just after the first wave landed at 8:44, whereupon the artillery barrage was lifted inland to the center of the island for another five minutes. Thereafter, because of the smallness of the island, very few call missions were fired.
All of the gunfire detonated the main ammunition dump on Engebi as Colonel Walker’s amtracs made their way to the island covered by LCI gunboats. Many of the LCI rockets fell short forcing some amtracs off course, while quite a few would break down as they had been worn out by the attack on Kwajalein. Despite the technical difficulties, the first assault waves hit the beaches at 8:43. The 2nd Battalion hit Beach Blue 3 with G Company on the left, F Company in the center and e Company on the right; and the 1st Battalion hit Beach White 1 with B Company on the left, A Company in the center and C Company on the right. On the left, the 2nd Battalion pushed forward rapidly, bypassing isolated points of resistance and quickly overran the airfield by 10:30. F Company managed to swing towards Weasel Point on the west corner with remarkable speed. On the right, the 1st Battalion quickly split up with A Company advancing north to New Point and C Company towards Skunk Point on the southeast corner.
The Japanese put up a stiff fight against them, as their spider-hole defenses on the gap between the 2 companies were covered by the dense brush and palms. As a result, the 3rd Battalion would land at Beach White 1 at 09:55 and quickly advanced with tanks to clear the various tunnels and covered foxholes that resisted them. The Japanese were slowly forced northward along the island's eastern shore, eventually becoming isolated and cut down. By 1:10, Weasel and Newt Points had been cleared; and at 2:50, about 6 hours after the initial landing, General Watson declared the island secured. 6 minutes later, C Company captured Skunk Point; and by 6:30, the 1st Battalion secured their half of Engebi. The assault had been executed so fast that even the veteran IJA defenders were unable to offer any meaningful organized resistance. Bypassed Japanese troops and infiltrators did cause difficulties through the night, but mopping-up continued and Engebi was formally secured at 8:00 on February 19. American losses were 85 dead and missing and 521 wounded against the 1280 Japanese killed and 16 taken prisoner.
For the assault against Eniwetok, new intelligence indicated that the island was more heavily defended than expected, so Watson would reinforce the 106th Regiment with Walker’s reserve 3rd Battalion and some Marine tanks. What they would be facing on Eniwetok was a total of 2 flame throwers, 13 grenade dischargers, 12 light machine guns, 2 heavy machine guns, 1 50-mm. mortar, 11 81-mm. mortars, 1 20-mm. automatic gun, 3 20-mm. cannons, and 3 light tanks. The Eniwetok garrison was divided into 5 forces, 3 on the lagoon shore, 1 placed so as to cut off the narrow eastern neck of the island, and 1 to be held in reserve. The 3 lagoon shore forces were to place their weapons so as to obtain interlocking bands of fire over the surface of the lagoon. The force in the east was to protect the rear of the 3 lagoon shore forces from any American units landing on the northern tip of the island. The reserve force was placed to the rear of the forces on the lagoon shore, near the western tip of the island. The defenses of the island consisted mostly of foxholes and trenches, which were better constructed and better camouflaged than those at Parry. After the capture of Kwajalein, the Japanese had begun construction of concrete pillboxes on the southwest tip of the island and had dug additional foxholes. Land mines were also found on Eniwetok.
Colonel Ayers’ new plan was to land his two battalions abreast. 1st Battalion would land on the right on Yellow Beach 2 and was charged with making the main effort to the west to clear the lower end of the island. The 3rd Battalion would land on Yellow Beach 1 and form a covering line just east of a road that bisected the island from the lagoon to the ocean shore. For the assault, the infantrymen lacked field artillery support; and although Eniwetok had also been subjected to naval bombardment on February 18, it had only received a fraction of the bombardment targeted against Engebi and Parry. A total of 1,179.7 tons of naval shells had been fired on Engebi, 944.4 tons were to be used on Parry, but Eniwetok received only 204.6 tons altogether.
At 8:10am on the 19th, carrier planes began to bomb and strafe the beaches and LCI gunboats followed this up with a last-minute rocket attack against the landing areas. Meanwhile, although the arrival of the marine tanks was delayed by choppy seas and a 9-foot embankment just inland halted the amphibian tanks, but the Americans would manage to hit the Yellow beaches at 9:16. The 3rd Battalion landed on Beach Yellow 1 with L Company on the left, K Company on the right, and I Company following as reserve. Upon landing, L Company, followed by I Company pivoted east along the pier while K Company pushed across the island to reach the opposite coast at 10:30. On the right, however, the 1st Battalion encountered dense spider-hole defenses as C and B Companies attempted to push across the island while A Company attacked southwest along the coast. By noon, the front line of the 1st Battalion was in the shape of an S, extending from the lagoon to the ocean.
The Japanese at this point made a bit of an unexpected move. As the Americans penetrated further inland, the Japanese began abandoning their positions and launched a 400 man counterattack. The Japanese managed to break through before getting completely cut down causing some havoc, but by 12:45 were beaten back. The American casualties were very high during the fight. Because of the strong resistance, Ayers ordered his 3rd battalion to attack east and for the reserves marines to land and relieve the left half of the 1st battalion's lion. The American attack to the west resumed with A Company on the right wing making slow progress through the enemy positions near the lagoon, but the mingled elements of C and B Companies even after being reorganized and supported by 3 Cannon Company guns, could not push through the line taken up by the enemy at the end of his counterattack. Although it steadily reduced the Japanese positions, the attacking force was unable to move forward.
By 2:25, the 3rd Battalion, 22nd Marines landed, passing through Ayers’ 1st Battalion one hour later. Both battalions then launched a concerted attack towards the southwest end at 3:15, yet the Marines would soon lag behind, their advance delayed by the rugged terrain and the lack of adequate illumination and tank support. While the fight for Eniwetok was underway, the Amphibious Reconnaissance Company occupied Japtan by nightfall after first securing 10 unoccupied islets on the atoll's eastern rim while the scout tank battalion secured eight islets on Eniwetok’s eastern rim, successfully subduing the enemy resistance on Rigilli. This would allow Watson to have some much-needed artillery support for the attack against Parry.
On Parry the Japanese were able to construct very few installations and gun positions above ground in the short time that the brigade was there. With very few exceptions, the defenses consisted mostly of foxholes and trenches. These fell into two categories, the old and the new. The old foxholes and trenches were located on the ocean side, were well constructed, and often lined with rocks or coconut logs. Relying on their estimate of American amphibious tactics as demonstrated at Tarawa, the Japanese had recently undertaken heavier defenses on the lagoon side. These were freshly and hastily constructed, and therefore much inferior. All entrenchments were well camouflaged. A typical strong point consisted of a spider-web pattern of entrenchments. In the center of the web was a large personnel shelter lined and covered with coconut logs. Strips of corrugated iron and a thick layer of sand were placed over the log roof. The center was surrounded by a circle of foxholes ten to fifteen feet apart, mostly roofed over with corrugated iron. These holes were connected with one another by narrow trenches or tunnels. The trenches and tunnels on the outer edge of the web were in turn joined by radial trenches and tunnels to the shelter or control foxhole in the center of the position. The entire web was extremely well camouflaged and very difficult to locate. Parry was honeycombed with positions of this sort.
Back to the action to deny the enemy an opportunity for the customary aggressive night tactics, Ayers ordered a night attack at 6:50. At 3:33 on February 20, Ayers’ 1st Battalion therefore managed to reach the western end of the island, though the Marines were still 100 yards to their left rear. The Japanese, meanwhile, attempted to probe and infiltrate through the night, finally counterattacking at 09:10. The 3rd Battalion, 22d Marines, found one of the main enemy defenses, manned by a strong and determined force, at the southwestern corner of the island in its zone. A combined force of light and medium tanks, 5 guns from the Cannon Company, 106th Infantry, and a supporting rifle company from the 1st Battalion, 106th Infantry, joined the Marines in destroying the enemy during the day. The 1st Battalion, 106th Infantry, mopped up its zone. The next day, after the withdrawal of the Marines, the battalion ran a line across the island from the pier and mopped up to the western end. A Company , at the right, finished first and returned to the battalion area near the landing beach. B Company , in the center, reached the end of the island a little later and then went for a swim. C Company , on the ocean side, found 22 of the enemy in hiding and destroyed them in a firefight that sent some bullets over the heads of B Companies swimmers. B Company came out of the water, dressed, and rejoined the fight. The western end of Eniwetok Island was finally clear of Japanese. By 2:45, the stronghold was finally reduced and the western end of Eniwetok was at last secured.
To the east, Ayers’ 3rd Battalion also attempted to continue its attack during the night, but this proved futile as the troops lacked the confidence and experience for such a difficult task. As such, the battalion halted at 4:30, about a third of the way from the island's north end. They resumed their attack at 7:00 on the 21st, finally reached the north end at 4:30. The island was finally declared secure at 5:21, with the Americans losing 37 killed and 94 wounded against 800 Japanese killed and 23 taken prisoner. Because action had been bogged down at Eniwetok, the assault on Parry was delayed until the island was reduced and Walker’s 3rd Battalion could re-embark as the regimental reserve. In the meantime, aerial, naval and artillery shells had pounded Parry for three days . Naval bombardment dropped on Parry totaled 944.4 tons, considerably more than the weight delivered on Eniwetok Island; the weight of artillery shells came to 245 tons, and aerial bombs added 99 tons more. Meanwhile while the rest of the 22nd Marines were brought from Engebi to southern Eniwetok.
By this point the expedition was running low on ammunition and weapons. Naval and artillery shells were carefully apportioned. From all the ships, available grenades and demolition charges were gathered. To supplement them, 775 grenades and 1,500 percussion caps were flown in from Kwajalein while the attack was in progress. Other units surrendered BAR's and rifles to equip the 22nd Marines. In addition, the Marines had found the M1 carbine, with which many men had armed themselves, to be a less than effective combat weapon, and M1 rifles and Browning Automatic rifles were redistributed from 106th Infantry units to replace them.
For the last assault of the operation Catchpole, Walker planned was to land two battalions abreast directly against the defenders’ strongpoints; and after seizing the beachhead, tanks and infantry were to press forward to the ocean side of the island. Battleships Tennessee and Pennsylvania took positions only 1,500 yards north of the landing area and not only mauled it with their big guns but also hit it with their 40-mm. automatic weapons batteries. From the other side of the boat lanes, the heavy cruisers Indianapolis and Louisville and the destroyer Hailey also fired. Smoke and dust blew out over the lagoon without masking the target for the battleships but with serious consequences for the other three warships and for the landing craft that started ashore at 8:45. 3 LCI’s that approached through the haze with the first wave to fire rockets were hit by 5-inch shells from Hailey, killing 13 and wounding 47. Some LVTs landed outside the designated beaches, thus widening the front and making necessary the suspension of artillery fire in their vicinity. Other tractors crisscrossed or fell behind, so that the landing teams had difficulty in reorganizing on the beaches. While the tractors made their 15-minute run from the line of departure, two formations of planes bombed Parry in the last of 219 sorties made during the 6 days of action at Eniwetok Atoll. This time they only bombed the island, omitting strafing runs because of the type of defense trench systems on Parry Island.At 09:00, Walker’s 1st battalion landed at 09.00hrs on Green 1 just north of the island's central portion, with Companies B, C, and A in line left to right. It was 200yds too far south, only landing on the extreme south edge of its assigned beach.
The 2nd Battalions landed at 9.00 on Green 2 near Parry's northwest corner, but 200yds farther south than intended, with part of the battalion landing on about two-thirds of Green 3 to the south. Mines were encountered on the beach, causing some casualties. In the line were, from left to right, companies G, F, and E. The first troops struck Green Beaches 2 and 3 at 9:00, with a wave of tractors and one of LCM's carrying medium tanks directly behind them. Heavy machine gun and mortar fire greeted the marines at the water's edge. As they tried to form an assault line, enfilading machine gun fire also struck them from a concealed position on the pier at the right. The machine guns were silenced by grenades and by shells from the amphibian tanks. Then the assault passed inland. Some of the enemy in trenches and foxholes in the dune line on the beach, men who had survived the bombardment, were overcome in hand-to-hand fighting. Thankfully, shells from the amphibian tanks managed to silence the Japanese guns, which allowed the Americans to move inland and to land their medium tanks behind the battalions.
The defense plans for Parry outlined that about one half of the troops were disposed at the water's edge, where they were to be grouped into strong points about 140 feet apart. The defense of the beaches was to be supported by mountain guns, 20-mm. automatic guns, and other weapons. The mountain guns and 20-mm's were to fire first. Light and heavy machine guns were to fire on landing craft before and after they reached the underwater obstacles. Next, mortars and grenade throwers were to deliver concentrated fire against the enemy at the beaches and were to cover the sectors between fortified areas and strong points. To facilitate the employment of artillery and heavy weapons, the order called for fields of fire to be cleared through coconut groves. The order gave quite explicit instructions for measures against tanks: "Destroy enemy tanks when they are stopped by obstacles by means of hollow charge anti-tank rifle grenades, close-in attack, land mines, water mines, and Molotov cocktails. Especially at night, have a part of the force attack them." The order made it very clear that the brigade was not expected to survive an American assault once it had established a beachhead. Any troops remaining after the Americans had landed in force were to assemble in a central area. Then, the order continued, "...sick and wounded who cannot endure the battle will commit suicide. [Others]... will reorganize, return to battle as a unit, and die fighting.”
3 dug-in Japanese light tanks decided to attack, rather than earlier when the infantry were vulnerable. Yet the Shermans immediately destroyed them before they inflicted any damage, so Walker’s battalions would be allowed to push forward against the retreating enemy. While Companies G and F swung left to reach the north end by 1:30, E Company drove straight across to reach the ocean shore by 12:00. Then, as the Marines were consolidating, a group of 200 Japanese were discovered marching north and were wiped out within minutes.
Over on the right, B Company reached the ocean coast at 11:55, while Companies C and A swung south and successfully reached Valentine Pier by 1:30. Walker’s reserve 3rd Battalion landed at 10:00, immediately advancing south while clearing bypassed enemy pockets. After artillery bombardment, the attack south was launched at 1:30. Pressing through thick underbrush, both battalions achieved rapid progress as they overran a series of trench and foxhole defenses. The battalions were 450 yards from the island's southern tip when they halted for the night.Walker decided to declare the end of enemy resistance at 19:30, radioing Brigadier General Walker, "I present you with the island of Parry at 7.30."
The Only slight enemy activity that existed anymore was occasional sniping, which would be swiftly cleared by 09:30 on February 23. For the capture of Parry, Marine casualties were 73 dead and missing and 261 wounded against 1300 Japanese killed, including General Nishida, and 66 captured. In total, American casualties during the Battle of Eniwetok came to 313 killed, 879 wounded and 77 missing. The Japanese had lost their entire garrison, with 3380 killed and 105 captured. Between March 7 and April 5, Walker would then conduct Operation Flintlock Jr., carrying 29 successful landings, securing 14 mostly unoccupied atolls and killing over 100 Japanese at the cost of two Marines killed. Other detachments would finally occupy the Erikub, Aur and Ujelang Atolls by the end of April, leaving only Mille, Maloelap, Jaluit and Wotje bypassed and unoccupied, in addition to the Japanese presence at Kosrae, Wake and Nauru.
Over on Jaluit Rear-Admiral Masuda Nisuke commanded the 13,000 personnel and beginning on March 4th, the 4th Marine Base Defense Aircraft Wing, headquartered on Majuro, and the 7th Air Force commenced a concerted campaign to neutralize the Japanese garrisons, which continued until the war's end. Navy Aviation and Army Air Forces had previously destroyed most Japanese aircraft on these islands. The 13,000 tons of aerial-delivered ordnance, coupled with frequent naval shelling, killed 2,564 Japanese and 4,876 died of disease and starvation; the Marines sprayed oil over the garrisons' gardens. Fighter-bomber units deploying to the Pacific would first serve in this role, perfecting their bombing techniques before moving forward to support other operations as new units replaced them. The Japanese survivors would finally surrender on September 2, 1945.
As the American commander took stock of what they had achieved in the Marshalls, their confidence and self-assurance rose to new heights. In less than 3 months’ time, the tragic and costly lessons of Tarawa had been refined and integrated into amphibious planning and doctrine, and the results had been tremendous. To the extent that further improvement was needed, it was in the details of execution rather than any deficiency in the plans themselves. Holland Smith concluded in his final report, “In the attack of coral atolls, very few recommendations can be made to improve upon the basic techniques previously recommended and utilized in Flintlock.” Over in Tokyo there was shock and incomprehension at the speed and ‘low cost’ of the US victory over the Marshall Islands. The implications for Japan’s future were dire. As Ichiro Koyose, the permanent Director of Japan’s Imperial Rule Association said in an address, “The Marshall Islands are the frontporch entrance to Tokyo … The enemy is probably finally thinking of some such thing as bombing Tokyo in deadly earnest …” Yet that is it for today on the Marshall Island front as we are going to be diving back into Burma.
The Japanese had launched their main offensive on the Arakan at the start of February, successfully infiltrating through the British positions to cut off their rear. By cutting the Indians' supply lines off, the Japanese expected to force them back into disarray; but these were not the same men they had been fighting for years. The Indian troops were better trained and ready to put up a real fight. This was seen when they faced Japanese attack after attack, using their all-round defensive brigade boxes, also referred to as "baby tortoise" or "beehive" tactics. This baffled Japanese,and soon they would leave the invaders effectively encircled and running out of supplies, as they themselves depended on what supplies could trickle to them over jungle trails. With increasing 'fanatical' desperation, the Japanese began to press home attacks seeking to secure vitally needed stockpiled supplies of food, arms and ammunition upon which their offensive depended. In the Sinzweya area, the 112th Regiment made a night attack on the 9th, successfully breaking through the southwest corner of the enemy's perimeter defense in the Sinzweya Basin. Although the Regiment was successful in firing an ammunition dump and doing great damage, the enemy's employment of tanks forced it to draw back without further exploiting the breakthrough. On the morning of the 10th, Major General Sakurai met Colonel Tanabashi on Hill 315, due northeast of Sinzweya, and encouraged him to press the enemy more aggressively. The failure of the 112th to achieve a signal success appeared, however, to have so depressed morale that the Regiment was reluctant to repeat its attack.
The 7th Indian Division, kept its morale high despite the intense fighting, rapidly mounting casualties and increasing exhaustion. They continued to fight on until the advanced Japanese units had exhausted their own food and ammunition. Whenever possible, the British-Indian troops also struck back against Japanese positions and harried their already tenuous supply lines. Furthermore, the massive firepower of the British mountain, field and medium artillery inflicted massive casualties on the attacking Japanese infantry. Firing from positions within each brigade box, carefully concerted artillery fire plans thus rained death upon Japanese troops scattered in the jungle throughout the divisional area. As such, the 71st Brigade would successfully recaptured Taung Bazaar on February 10, and was steadily advancing southwards towards the Ngakyedauk Pass.
That same day, General Giffard realized that there was no possibility of 15th Corps being able to reach the Indin-Rathedaung line before the pre-monsoon swell made amphibious operations impossible, so he recommended canceling the Akyab assault. He placed the 36th Indian Division under the 14th Army, allotted the 50th Brigade to 4th Corps and ordered the 25th Indian Division towards Chittagong. General Slim, however, realized that the Japanese plans had miscarried, so he directed General Christison to resume the offensive against the Tunnels-Buthidaung position as soon as he had cleared the land communications to his forward divisions.
Consequently, as the 29th Brigade of the36th division was arriving at Bawli, Christison sent the bulk of the 26th Indian Division to destroy the enemy in the Kalapanzin valley behind the 7th Division. By the13th, patrols from both divisions successfully linked up near Taung Bazar; but at the same time, the Japanese were bringing reinforcements for their attacks at Sinzweya. The Japanese offensive reached its climax on February 14 when General Sakurai called for an all-out attack that evening. The attack was courageous and managed to achieve some initial gains, but it was also uncoordinated, suicidal and unsuccessful, ending with the Indians reinforcing the Admin Box the following day. Meanwhile elements of the 5th Indian Division, regrouped and battered away against a heavily fortified Japanese roadblock at the summit of the Ngakyedauk Pass. Thus, the Japanese tactical and administrative position quickly went from bad to worse around Sinzweya, as pressure steadily mounted against its vastly outnumbered troops.
After a few days of bitter fighting the Japanese finally abandoedn their positions at Kyaukyit and Pyinshe Kala and began occupying areas covering the routes back to their main positions. By the 20th, the strength of the Japanese striking force had shrunk to 400 men increasingly-debilitated by lack of sleep and shortages of food. On the 23th, after a short but sharp fight, a battalion of 89th Brigade from the east and 123rd Brigade from the west linked up at Ngakyedauk Pass and by evening had firmly secured it. The following day, as soon as the 500 casualties from Sinzweya had been evacuated, the pass was opened to normal traffic and air supply of the 7th Division ceased. As Geoffrey Evans later wrote with obvious pride: “For eighteen days the British and Indian troops, most of them belonging to the administrative services, had withstood the determined attacks of trained Japanese infantry supported by guns and air. It spoke volumes for the war in which the junior leaders had carried out their task and the stout-heartedness of their men.”
At this point, General Hanaya recognized the inevitable and ordered the Ha-Go offensive to be abandoned. The shattered remnants of Sakurai’s command subsequently withdrawing in small parties. The last attack on Sinzweya, made on the 22nd, ended in failure. On the following night, acting on his own responsibility, Colonel Tanabashi withdrew his main force to Kreingyaung, leaving the 8th Company of the 112th Infantry at Ngakyedauk Pass and the 2nd Battalion of the 112th on a small hill south of Sinzweya. Upon receiving a report of Tanabashi's withdrawal, Major General Sakurai was really pissed off but realized that the move was undoubtedly inevitable, being forced by lack of food and supplies. At the suggestion of General Sakurai, the Division commander determined to suspend the offensive and ordered the Sakurai Unit to withdraw to the line of the Buthidaung-Maungdaw Road. Moving units into the line to cover the withdrawal, the movement south began on the night of 24 February and was completed by 1 March. The 1st Battalion of the 213th Infantry, which had been holding positions in the vicinity of the road between Ngangyaung and Maunghnama since 6 February, left its positions on the night of the 25th and, after breaking through the enemy lines, returned safely on 3 March.
Many units were trapped, however, between units of the 26th and 36th Divisions advancing from the north and 5th Division from the east through the Ngakyedauk Pass upon the anvil of the boxes. In the end, the Battle of Ngakyedauk Pass cost 15th Corps 3506 casualties, but it also marked the turning point in the Burma Front. The Japanese lost 3106 killed and 2229 wounded, in what would be the first time that they met well trained British-Indian formations in battle and the first time that their enveloping tactics, aimed at cutting their opponents' line of communications, failed to produce the results they expected. Not only had operation HA-GO been an abysmal failure, but it materially undermined the Japanese ability to resist further British attacks. By March 5th, the 15th Corps had completely recovered and resumed its own offensive against the now disorganized and weakened Japanese forces in Arakan. Although the Japanese staged a remarkable recovery and still offered dogged resistance, the 5th Division would capture Razabil on March 12th and the 7th Division would seize Buthidaung and later mop up the Letwedet Fortress in late March.
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The battle in the Marshalls absolutely shocked the Japanese in its speed, efficiency and low cost for the American forces. Now the Japanese feared the Americans would soon be in range to hit the home islands with their dreaded bombers. In the Burma Front, the former Japanese super soldiers were now realizing the Indian Army could no longer be pushed around.
