- 121 - Pacific War - Bougainville Counteroffensive, March 12-19, 1944

The Pacific War - week by week

Last time we spoke about Operation HA-GO, U-GO and some action brewing up on New Britain and Bougainville. Mutaguchi basically tricked his superiors at Tokyo into allowing him to attempt an invasion of India. Operations HA-GO and U-GO were simultaneously unleashed, the only problem was the allies were very ready to meet them. General Slim’s men captured documents indicating the true nature of the operations and he acted accordingly. The new box defense systems were employed as the allies lured the Japanese into major traps thwarting their designs against Imphal. The Japanese were fighting tenaciously, but time and supplies would not be on their side. Over on New Britain the allies advanced and managed to seize Talasea. Meanwhile on Bougainville the Japanese were preparing a large counteroffensive, attempting to breach the American defensive perimeter. The operation had just kicked off last episode and today we will continue the story.

This episode is the Bougainville Counteroffensive

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

The Marines departed Bougainville and were relieved by the Americal Division by the end of January 1944. Sporadic fighting emerged and through it Major General Griswold obtained intelligence indicating the Japanese would launch a major counter attack, most likely slated for early March. At the time Lt General Hyakutake was under extreme pressure to reduce the bombing against Rabaul. Rabaul as we know was smashed daily, suffering heavy losses. Admiral Koga had responded by taking away air units from Truk, but all this achieved was even more losses. Rabaul was neutralized, and Truk became vulnerable. The Americans had pummeled both so much, they were able to unleash a dramatic thrust into the central pacific aimed at the Gilberts, Marshalls and later the Carolines. Now it seems Hyakutake had been operating under some very bad intelligence, indicating to him the Americans were defending their perimeter with just a single division around the airfield. With the objective of destroying said airfield, Hyakutake did not know the actual number of defenders and would not enjoy movement by sea. The Americans had full control of the sea lanes, thus any IJN destroyers trying to move troops would run a risky gauntlet. By the first quarter of 1944, Rabaul had tossed meager attacks against the Americans, for example on January 23rd two bombers scored a direct hit over the living quarters of Brigadier General John Hodge and his senior staff officers.

What Hyakutake had to work with was 4300 men of the 45th regiment led by Colonel Isashi Magata. These men were considered the crack troops on Bougainville and they included artillery, mortar and engineering battalions. They were further supported by 4125 men of the 23rd regiment led by Major General Shun Iwara and 1350 men of the 13th regiment led by Colonel Toyo Horei Muda. All three units would be led by Major General Masatane Kanda. The 3 units made an arduous trek through the jungles to reach their jump off points by the evening of March 7th. Hyakutake then sent them a resounding message “time has come to manifest our knighthood with the pure brilliance of the sword. It is our duty to erase the mortification of our brothers at Guadalcanal. Attack! Assault! Destroy everything! Cut, slash, and mow them down. May the color of the red emblem of our arms be deepened with the blood of American rascals.” Major General Kanda also added his own message “The cry of our victory at Torokina Bay shall resound to the shores of our beloved Nippon. We are invincible.” All of these troops received a large morale boost from such message, but on top of that there was something else incentivising them all. They had adequate food to last them until April 1st, they literally needed to overrun the Americans to steal their provisions. Such was the reality of the Japanese island hopping campaigns.

Hyakutakes forces proved themselves far from invincible. Their artillery bombarded on the morning of the 8th, targeting the airfield at Piva Yoke. Their bombardment destroyed a bomber, 3 fighters, killed a single man, and forced a temporary evacuation of aircraft to New Georgia. It was now exactly the greatest of results. Artilleryman Stan Coleman vividly described the Japanese artillery attack “All of a sudden we heard a very different kind of ‘whoosh.’ It was made by a shell at the end of its flight, not the beginning. It was ‘incoming mail.’ All hell broke loose. In the rear some fuel dumps went up. Every American artillery piece in the perimeter went into action.” The American artillery counter-attack proved far more effective. The Japanese artillery units were forced to move positions constantly and then they were met by a new type of weapon. As Coleman recalled “Four blue Marine Corsairs came in with rockets. Rockets were a new ground-support weapon and I had never seen them … The rockets in flight made a fearful display. There was a tremendous concussion when they struck their target.”

That same night the Iwasa Unit attacked Hill 700 during a heavy downpour. Yet by 2:30am the first attacks were beaten off. It seems the experience persuaded the Japanese not to attempt another night attack on March 9th. Instead, they used occasional machine gun and mortar fire to disrupt the fitful sleep of the Americans. Then at 6:45am on the 10th, Iwasa launched another attack in coordination with Colonel Muda’s assault against Hill 260. Iwasa’s men clambered up the steep 70 degree slopes screaming maniacally. They would shout confused threats in English. A prolific slaughter occurred against one group of Japanese soldiers who seized out a pillbox and set up a machine gun post on the saddle of the hill. It was dearly bought. General Griswold had brought up more reinforcements for the 145th that same morning. Engineers put together a bangalore torpedo 72 feet long by connecting sticks of dynamite like a long pipe. The object was to climb the hill and then snake the charge down the opposite side into one of the pillboxes. Unfortunately the Japanese spotted them and fired a knee mortar, hitting the torpedo and killing the engineers. Another ruse was attempted shortly after noon with the object of getting the Japanese on the saddle to surrender. A public address system was set up with speakers aimed at Hill 700, and one of the division's Japanese interpreters spoke to the defenders. He informed them of the odds against their success and told them that they could not be reinforced. If they surrendered, it would be considered honorable. To die needlessly was foolish. For the short time he spoke all was quiet, but seconds after he had finished the Japanese directed a mortar barrage on the section of the hill from whence he was broadcasting. The day ended in victory for the riflemen of the 37th Division. At 11:15 an air strike by 26 planes and continuous artillery fire had devastated the Japanese. The day’s assault cost the lives of some 500 or more Japanese soldiers.

Meanwhile further south, the 1st battalion, 13th regiment was knocked out by heavy artillery fire. Colonel Muda sent his 3rd battalion, 13th regiment to attack the southern positions of the 182nd regiment around Hill 260. Hill 260, a twin-peaked rise close to the west bank of the Torokina River approximately four miles north of its mouth, was covered with heavy vegetation. The hill itself measured only 850 yards along its north-south axis and at its widest a mere 450 yards, and it was shaped roughly like an hourglass, with the highest elevations to the north and south connected by a narrow saddle. The eastern slope of the hill was precipitous, steepest along the South Knob, where it was almost perpendicular. The South Knob, which was considered the most important part of Hill 260, had been occupied by men of 2nd battalion, 182th regiment since early January, and vigorous patrolling had also been carried on regularly along the saddle and on the unoccupied North Knob. The hill was about half a mile east of the 182nd's main line of resistance. Between Hill 260 and the main line of the Americal was a small stream named Eagle Creek, which provided a natural defensive barrier. There was but a single trail leading from the main perimeter to South Knob. A small bridge over the creek could take vehicular traffic. The last hundred yards to the top of South Knob was a steep stairway cut into the sides of the hill. Possession of this portion of the hill was important for both sides. The Americans had built a platform near the top of a 150-foot banyan tree from which forward observers could see any enemy-activity along the Torokina River or along the highlands to the northeast. Conversely, if the Japanese could seize the hill they could have good observation of the American-held Hills 608 and 309 and the area behind them.

Under the cover of intense machine-gun and mortar fire, the Japanese managed to climb the steep slope of the South Knob and then burst in among the outnumbered Americans. The position was held by a reinforced platoon of Company G of the 182nd and a forward observer team of the 246th Field Artillery Battalion. The Americans were rapidly wiped out and dispersed as Muda’s men established a defensive perimeter over the crest of South Knob. Hearing the dire news, General Griswold ordered General Hodge to hold Hill 260 at all costs, an order that surprised many of the Americal's staff since they had not expected to try to hold the hill in the face of a concerted Japanese attack.

Companies E and F immediately advanced to occupy the North Knob and then attempted an encircling maneuver to counterattack the newly-established Japanese perimeter. Company E at 8:45 attacked South Knob from the southwest while Company F moved south. The company began its attack at 10:45 but halted after the troops had advanced a few yards into the cleared zone. The men took whatever cover was available and waited for flame throwers before trying to advance farther. At approximately 2:45 the commander, Lieutenant Colonel Dexter Lowry, ordered the attack resumed; Company E split and attempted an envelopment. The northern prong of the envelopment was halted but the infantrymen of the southern prong, using grenades and flame throwers, managed to gain a lodgment within earshot of the men of Company G who were still holding out in the pillbox.

Meanwhile, the 1st and 2nd Battalions, 145th Regiment had been reorganized and launched a counterattack against Hill 700 at 5:00. The Japanese unleashed intense mortar and artillery ied, but gradually were dislodge from the crest of the hill, leaving just 4 pillboxes remaining under their control. After the reestablishment of the original resistance line, Iwasa prepared his men to storm Pat’s Nose during the night. The Japanese had lost heavily during these attacks, which also cost the 145th three dead and 121 wounded. During the night, after a failed bayonet charge, the Japanese would reinforce their position on Hill 260. They then struck at Company E early in the morning of March 11th and although this attack was beaten off, the American situation in the lodgment had become desperate. Thus, after another Japanese flanking attack, the defenders would have to pull back towards North Knob. Company G was sent to relieve the beleaguered Company E but was halted by yet another Japanese flanking attack on Company E. General Hodge, fearful of reducing his main defense line, felt that he could send no more reserves to the hill and therefore decided to break off the action and pull Company G and what was left of Company E off South Knob. They retired, unimpeded by the Japanese, behind Eagle Creek. There they joined Company B and then proceeded to cut a new trail up to the crest of North Knob.

At daybreak on 11 March, Iwasa launched another attack against the promontory called ‘Pat’s Nose,’ some 150 yards to the west of ‘Hill 700.’ Flanking 37 mm guns cut the Japanese charge to shreds. Iwasa’s rear echelons kept advancing over the dead bodies of those who had been leading the charge and eventually managed to break through the barbed wire, though they too were ultimately destroyed. After an hour of suicidal attack Iwasa’s troops receded leaving some 84 dead behind them. The 37th Division's historian described this attack: "Brandishing their prized sabers, screeching 'Chusuto' (Damn them!), the Jap officers climbed up the slope and rushed forward in an admirable display of blind courage. The men screamed in reply 'Yaruzo' (Let's do it!) and then 'Yarimosu' (We will do it!). As they closed with the American doughboys, the leaders cried' San nen Kire!' (Cut a thousand men!).

General Beightler, concerned over the inability of the 145th to reduce the Japanese positions on Hill 700, decided to send the 2nd Battalion, 148th Regiment to finally wipe out the enemy opposition. After a heavy mortar and artillery bombardment, two platoons of Company E advanced east from Pat's Nose trying to flank the saddle while a third attacked west from Hill 700. Thirteen men were killed before the momentum of the attack waned and the battalion dug in on the ground it had gained. Meanwhile, Companies F and B, now under the command of Brigadier-General William McCulloch, began a two-pronged attempt to drive the Japanese off South Knob. Supported by flamethrowers units from the 132nd, men of Company B got across the saddle and onto the knob, but were ultimately pulled because of the enemy’s numerical superiority.

Meanwhile, Colonel Magata Isashi’s 45th Regiment had limited its actions to heavy patrol activity while the Iwasa Unit was attacking Hill 700. The terrain fronting the 129th Regiment, which was holding the center of the 37th Division line, was much more favorable for the Japanese than that encountered by either the Iwasa or Muda forces. The land was relatively flat, although cut by many gullies. The 129th's line, defended by two battalions, extended over two miles, curving slightly from just east of the Numa Numa Trail southwest to the right flank of the 148th Regiment. The Japanese had easy access to the 37th's lines, first via the Numa Numa Trail and then following the lowlands and gullies adjacent to the creeks. Colonel John Frederick, the regimental commander of the 129th, had recognized the potential vulnerability of this position and had organized a defense in depth during the two months prior to the attack. The position was anchored by a large number of mutually supporting earthen and log pillboxes and protected by a double apron of barbed wire, in front of which antipersonnel mines had been laid. Machine-guns had been sited to provide interlocking fire and additional barbed wire had been placed to channel potential attackers into the main machine-gun fire lanes. The 129th's cannon company of 75-mm pack howitzers, and its mortar sections had been augmented by 37-mm and 40-mm anti-tank guns, which could fire canisters in flat-trajectory direct fire. Thus although Colonel Magata's men did not have to climb up steep cliffs to get at the American positions, they would find the 129th's defenses near impregnable to relatively lightly supported infantry attacks, no matter how fanatically delivered. While patrolling, some documents were taken from dead Japanese bodies detailing Magata’s plan, so Colonel John Frederick’s 129th Regiment was expecting his thrust.

On the 11th, the contact between Japanese and American patrols increased, as did the amount of incoming mortar fire, so the American supporting artillery was directed to fire intermittently into the areas where the Japanese were located.Colonel Frederick at 4:00pm ordered all his outposts back into the main perimeter and division artillery fired a ten-minute concentration along the 2nd Battalion front. At dusk, a heavy firefight then broke out as the Japanese opened up with machine-guns and mortars on Company G's area. During the exchange of fire, which lasted until 7:20pm, men in the pillboxes did not fire their machine guns, since they did not want to reveal their positions. The firing died down to only a few exchanges during the night, generally directed at Japanese infiltrators, who were attempting to cut through the barbed wire. Finally, at dawn on the 12th, Magata sent his 1st and 3rd battalions in column to strike Company G. Although the attacking Japanese suffered very heavy casualties from machine-gun fire, they penetrated the first line of defense by sheer weight of numbers. Moving up the streambed running into the sector, they captured one pillbox after another until they held a total of seven.

Frederick then sent his reserve 1st Battalion to support Company G, while also launching a counterattack that managed to contain the enemy expansion and that also retook two pillboxes by late afternoon. Meanwhile, Companies E and F of the 148th were converging against Iwasa’s remaining strongpoints. Using grenades, rifles, and flamethrowers, they finally reduced the pillboxes one by one, leaving the Japanese in possession of only one pillbox by 1:00pm. An historian of the 145th Regiment described the fight for this last strongpoint: “On the second day, the last held enemy pillbox was subjected to everything an infantryman has at his command. Hand grenades by the dozen were thrown at the emplacement. Still there was responding fire. Flamethrowers scorched the hidden Nip into silence. The searching parties entered the charred remains of the emplacement only to hear the click of a Japanese grenade being detonated. In the far corner they made out the dim outline of a Jap, eyes bloodshot, mouth bleeding, face seared, clothing burned. His clenched fist held a grenade. Even as the men dove for cover outside the pillbox, the Jap threw the grenade at them as in a dying gesture.” Despite a heroic resistance, this was cleared in the afternoon at last, thus completely restoring the original 145th’s line.

While this was going on, after a heavy artillery bombardment, McCulloch sent Companies B and F once again to storm the South Knob. Company B in a column of platoons with six flamethrowers attempted to storm the height from the northwest. The leading platoon was halted by machine gun fire from pillboxes dug in on the west slope. Once these were spotted a concentration of mortar and machine gun fire was directed against these Japanese positions, enabling the following platoon to reach the top of the knob. There, it was pinned down by heavy fire from machine guns sited east of the observation post banyan tree. American mortar fire, together with the work of the flamethrower operators, who were covered by BAR men of the 3rd Platoon, soon negated these positions. Although it appeared that the South Knob would soon be in American hands, ammunition for the attacking platoons was running low, there had been numerous casualties, there were no more reserves, and it was already late in the day.

Despite this, Hodge sent Company A of the 132nd Regiment to reinforce the gained position. Company A of the 132nd tried to scale the height from the southwest to join Company B of the 182nd on the crest. A burst of machine gun fire killed the company commander, however, and disorganized the attack so much that under the best of conditions the men could not reach the top before dark. Hodge then reluctantly recalled his forces and, sensing the futility of further attacks, he requested permission to pull off South Knob. Yet Griswold refused the request and a new attack was ordered for the next day using two companies of the 1st Battalion, 132nd Regiment. After another heavy artillery bombardment, Company A attacked southward along the narrow saddle while Company B attacked up the southwest slope. Surprisingly, the two companies of the 182nd that had led the attack the day before had not been kept in immediate reserve but had been pulled back within the perimeter. Therefore there were no reserve troops available to help exploit the minor gains made during the afternoon. As night fell, Major Raymond Daehler, the battalion commander, reluctantly pulled his men off the knob and retreated to safer ground.

Despite repeated attacks from 12 -16th, Magata had made no headway and finally withdrew his forces. After Iwasa's retreat, the men of the 145th had the dubious honor of policing the slopes of Hill 700 and burying the corpses left behind. In an area roughly 50 yards square, corpses that could be identified were counted. This count included only those within the barbed wire lines in front of the pillboxes. As one observer noted, the carnage was a sight to turn even the most cast-iron stomach: “Enemy dead were strewn in piles of mutilated bodies, so badly dismembered in most cases that a physical count was impossible. Here and there was a leg or an arm or a blown-off hand, all to show for the vanished and vanquished enemy. At one point, Japanese bodies formed a human stairway over the barbed wire. Five enemy were piled one on top of the other, as each had successively approached the location to use a predecessor as a barricade and then fall on top of him as he in turn was killed. Farther out from the perimeter, where a little stream wound its way parallel to it, Japs killed by the concussion of thousands of mortar shells lay with their heads, ostrich fashion, stuck under the least protection they could find”. What was left of Iwasa’s shattered command to the relative safety of the Blue Ridge, Approximately two miles east of the American perimeter. During the day, as the Japanese were retreating, American planes dropped 123 tons of bombs on the intermediate areas, and destroyers off shore lobbed their five-inch shells into the high ground to the north and east of the perimeter.

Further east, Magata launched a night attack at 4:00am, managing to gain another pillbox, so Griswold would decide to reinforce Frederick with a tank platoon. General Griswold agreed to send the 1st Platoon of Company C, tank battalion, forward, with the stipulation that they be used only to augment the infantry as they took back the lost pillboxes. 4 tanks supported a midmorning assault, which successfully retook two pillboxes. Another tank-infantry attack began at 1:15pm but was halted since the tanks were low on fuel and ammunition. They were replaced by tanks of another platoon, which assisted the infantry of the 129th in destroying all the other pillboxes held by the Japanese and in restoring the front line roughly to the positions held before the Japanese attack of the previous day. Alongside this, Griswold ordered the reconnaissance troop forward to occupy the right sector of the threatened area, with the 131st Engineer Regiment taking over the extreme left. General Hodge requested to be reinforced with tanks; but as they could not cross Eagle Creek, McCulloch and him reluctantly decided to cease any further attempt to drive the Japanese off South Knob. He thought that the three-day action against the Muda Unit had obviously so weakened it that it no longer posed a danger to the perimeter proper. Thus, it could be contained and continually harassed by combat patrols and neutralization fire.

On the 14th, the fighting fell into just intermittent small-arms and mortar fire from the Japanese as Colonel Magata shifted some of his troops to more favorable positions and as he brought his reserve 2nd Battalion, 45th Regiment and 2nd Battalion, 13th Regiment to reinforce further attacks. Magata also received the 1st Battalion, 81st Regiment and the 3rd Battalion, 53rd Regiment from the north, tossing them into his new reserve. At 4:00am on 15th, the Japanese launched a heavy local attack against the right of Company F. By dawn, they had captured one pillbox and penetrated approximately 100 yards into the perimeter, where they were ultimately checked. A coordinated counterattack by Companies F and C in conjunction with a 36-plane strike against the Japanese positions, managed to retake the pillbox. Further tank-infantry attacks finally drove the entrenched Japanese out of the salient and successfully restored the line. Losses for the day were 10 dead and 53 wounded, while 190 Japanese were counted dead. The Japanese then repeated the attack the next morning at 4:00am on the high ground east of Cox Creek with a larger force of elements from three battalions. They penetrated approximately 75 yards before their momentum was halted. Then, Company B, supported by a platoon of tanks, counterattacked and restored the original line by midmorning. Finally, shortly after noon, the tanks moved beyond the wire and shelled the draws and ravines in front of Company F until their ammunition was exhausted. Once again the Japanese had paid heavily for no gain. 194 dead were counted and 1 prisoner taken, while the Americans only lost 2 dead and 63 wounded. Though the counter offensive is nowhere near done, that is all for this week as we now have to jump over to the CBI theater.

General Merrill’s Marauders had been given the task of cutting the Japanese supply line over the Kamaing road. At Merrill’s disposal were the three battalions of GALAHAD, each in turn broken down into two combat teams. The teams bore the code names Red and White for the 1st Battalion; Blue and Green for the 2nd Battalion and Khaki and Orange for the 3rd Battalion. Each team included a rifle company, heavy weapons platoon, pioneer and demolition platoon, reconnaissance platoon, and medical detachment, with a combined strength of sixteen officers and 456 enlisted men. The marauders had been recruited from units in the south-west pacific and from Trinidad in the Caribbean. Many of the volunteers were notably seen as pure psychopaths. Their training in India was quite painful, a lot so for the military police nearby. 10 percent of the Marauders went AWOL, many of them amused themselves by shooting at catte, chickens and other birds, apparently even at the feet of locals to make them dance. One incident apparently had some of them aboard a train to Ledo firing out of the windows. They were seen as arrogant, psychopathic, gung-ho and they had many colorful catchphrases such as ‘My pack is on my back, my gun is oiled and loaded, and as I walk in the shadow of death I fear no sonofabitch.’

The baptism of the Marauders did not impress their commander who was obsessed with speed and efficiency. The Galahad unit had departed on February 24th and on receiving orders to move to his forward assembly area, Merrill sent his three intelligence and reconnaissance (I & R) platoons to check trails as far as the Tawang Hka, the first of the three considerable streams that crossed the line of march. At 6:00am on the 24th, the 5307th moved out, screened by the I & R platoons. Next day two of them clashed with Japanese patrols and the point of one platoon, Pvt. Robert W. Landis of Youngstown, Ohio, was killed. Luckily radio communication between the 2nd Battalion, 56th Regiment and the 18th Division’s headquarters broke down at this time, so General Tanaka was unaware that a semi-detached American unit was operating off to his flank.

Stilwell fretted at the time it took them to cross the 130 miles over the Naga range to the battlefront. Part of the problem was that 5307th Composite was mule-based and had to bring 700 animals with them but none of them knew anything about muleteering. Whatever misgivings Stilwell had when he saw his reinforcements, he kept them to himself and addressed them simply and quietly, explaining that their new mission was to hit Walawbum. On the afternoon of the 28th, Merill received the new orders, calling for cutting the road on either side of Walawbum, the 2nd Battalion led by Colonel McGee to the west, the 3rd Battalion led by Colonel Beach to the south, and the 1st Battalion led by Colonel Osborne to patrol along the Nambyu Hka north of the Kamaing Road. Positions near Walawbum would be held until the 38th Division relieved the 5307th.

Unfortunately the freak rains already experienced by Stilwell and his men continued, so that the Marauders’ eight-day, 60-mile trek to Walawbum turned into something of a nightmare. On March 2nd, the Marauders crossed the Tanai Hka and arrived at their assembly area. With the last elements at hand, General Stillwell initiated his offensive. On the 3rd, Colonel Brown’s tankers, with the support of a battalion from the 65th regiment advanced against Maingkwan. Facing light opposition, they managed to advance 5000 yards northeast of Maingkwan by 3pm when they were halted by heavy Japanese fire. Meanwhile, Merrill’s marauders were clashing with Japanese at various places throughout the day. The 3rd Battalion had a sharp fight at Lagang Ga, killing 30 Japanese and seized the area needed for the building of a drop field. One of the battalion's two combat teams, Khaki, stayed at Lagang Ga to build and protect the dropping zone. Orange Combat Team kept on to the high ground east of Walawbum and dug in, its heavy weapons commanding the Kamaing Road. This saw them securing high ground east of Walawbum. The 22d Division, was also moving ahead, and so far was in step with the tanks and GALAHAD. On the 3rd, the 64th Regiment was near Ngam Ga, east of the Kamaing Road. The 66th to the west was in contact with the third regiment, the 65th, as it emerged from the Taro Plain.

Tanaka’s intelligence indicated the Americans were at Walawbum. The Chinese 22nd and 38th divisions were advancing slowly, so he believed his rearguard could hold them back so he could take the bulk of his strength to attack the americans. On the 3rd, the 55th and 56th regiment began retreating in order to launch an enveloping maneuver against Merrill's marauders. The next day, Brown found the enemy gone and his men were able to advance 3 miles southeast, getting his tanks in line with Maingkwan. Over at Walawbum, Merrills 3rd battalion were resisting against ferocious attacks from the Japanese. The drop field at Lagang Ga was attacked at dawn on the 4th but the garrison held. Orange Combat Team opened the battle in its sector with mortar fire on Walawbum, drawing mortar and 75-mm. fire in return from the 56th Infantry Regiment, which had been Tanaka's left flank, as it assembled for attack. When it moved, the 56th tried to cross the river and work around the Americans' flanks, where it met booby traps and ambushes thoughtfully prepared for just such a contingency. Some Japanese did cross to the east, but this failed to affect the course of the action, and 75 dead Japanese were counted, as against one American dead and seven wounded. These latter were evacuated by air the same evening. The 2nd battalion managed to get across the Kamaing road west of Wesu Ga where they established a roadblock.

Finding out about the roadblock, Tanaka dispatched his forces to clear them out. On the 5th the Japanese appeared to be forming for an attack, but mortar fire seemed to be successful in breaking up such attempts. To the south, Allied aircraft could be seen bombing and machine-gunning what Orange Combat Team took to be Japanese reinforcements. One indication that the Japanese were increasing their strength in the immediate area lay in their being able to force Orange Combat Team's I & R Platoon back across the river about noon. Simultaneously, the 66th regiment liberated the abandoned Maingkwan and began advancing south over the Kamaing road. Brown's reconnaissance had found a good trail running south from Tsamat Ga, and on the morning of the 5th the tanks moved out through the jungle. After the engineers had prepared a small stream for crossing, the tanks broke into a freshly evacuated Japanese bivouac area. Jungle vines looping across the trail from either side, and connecting masses of vegetation and trees, made effective obstacles as they slowed down the tanks by catching their turrets; not until late afternoon did the armor break out on the trail running east and west between Maingkwan and Wesu Ga. Almost immediately the tanks encountered what seemed to be a company of Japanese defending a small but marshy stream. The stream did not seem fordable, so Brown attacked by fire alone. Unknown to him, his tanks were firing on Tanaka's division headquarters, and now lay squarely between the 18th's headquarters and its 56th Regiment.

This understandably threw Tanaka’s plan into chaos, as his forces who were unsuccessfully attacking Merrills marauders were becoming encircled. Tanaka decided to swing his force around the American roadblock, using a Japanese built trail that the Americans did not know about.The bypass road over which the 18th was to withdraw had been built by the Japanese engineers some days before and quote “The Engineer Regiment commander, Colonel Fukayama, had considered the possibility of reversals in our position and, in order to facilitate the withdrawal of the division, he had previously cleared a secret jungle trail about 20 kilometers long leading from the vicinity of Lalawng Ga to Jambu Hkintang on his own initiative. This trail was used in the withdrawal of the main body of the division.”

By nightfall, Merrill’s 2nd battalion had pulled out to Wesu Ga and were trying to link up with the 3rd battalion south of Walawbum. On the 6th after heavy artillery bombardment, at 5:15pm an estimated two companies of Japanese in line of skirmishers, with heavy supporting fire, crossed the river. The American mortars continued their work; the automatic weapons held back until the Japanese were within fifty yards. Two heavy machine guns, which had a clear field of fire along the river bank, were especially effective. The Japanese failed, leaving many dead on the open ground east of the river and on the river banks. Orange Combat Team found its ammunition low, and so sent a request for more to Khaki Combat Team, which was about one hundred yards downstream. This was however just a diversionary attack, as most of the 18th division were escaping unmolested.

Meanwhile elements of the 113th regiment were beginning to arrive to Lagang Ga and unfortunately an incident of friendly fire would occur. The remainder of the 38th Division and an American patrol met near Walawbum on March 7th. The recognition signal had been arranged as three bursts of three rounds each. This necessarily meant there would be firing when the Chinese and Americans met. When the tops of the American helmets, which looked not unlike the Japanese pot helmet when their brims were invisible, appeared through and over the brush, there was a brief exchange of fire in which three Chinese were wounded before identity was established. Such is the nature of coordinating multiple nations' armies during actions. General Sun and Merrill’s marauders made a withdrawal beginning on the 7th in order to circle south and cut the Kamaing road again, this time even further south than before. Brown in the meantime had advanced to Ninghku Ga where he secured support from a battalion of the 64th regiment and launched a coordinated tank-infantry attack against Kumnyen.

At around 3pm, the tanks and infantry assembled across the Kamaing road in two places, establishing a roadblock while the tanks moved out aggressively along the road to east and west. On the 8th, Brown’s tanks then moved along the Kamaing Road and onto a trail that showed signs of heavy traffic. This allowed them to discover Tanaka’s evacuation route, finally occupying Walawbum by the end of the day. Brown later recalled, "swarming with people from the 64th Infantry and the 113th Infantry who, to the tankers' great disgust, disputed the latter's claim to have taken Walawbum”. Though the 18th division had managed to escape Stilwells traps, the American-Chinese forces had still scored a well-earned victory. The road to Myitkyina was not open.

The cost for this first series of victories in the North Burma Campaign were 802 Chinese dead and 1479 wounded, plus 530 undifferentiated casualties from the fall of 1943 to March 18, 1944. But the temporary American-Chinese collaboration did not presage a wider Sino-American synergy, and the Marauders found operating with their allies a major problem. One issue was that of disease: the Americans caught dysentery in large numbers and attributed this to the insanitary habits of the Chinese, especially their refusal to boil their water, or to wash their hands after using the latrines. The American K-rations also proved unsatisfactory and unsuitable for jungle warfare, as the Chindits soon discovered. Yet that is all for burma as we now have to jump over to New Guinea.

The advance and pursuit upon Madang resumed on March 12th as the 2/12th Battalion found Ward's Village unoccupied while the 57th/60th Battalion secured the abandoned Saipa 2. The 57th/60th Battalion advanced swiftly by night and finally concentrated at Yokopi two days later. On the 16th, Brigadier Hammer then received a rather ambiguous order. Chilton had redefined the division's role "in the light of the present situation". While the 18th Brigade was to watch the 15th Brigade's immediate left flank from the high ground between the lower Evapia and Mene Rivers, and the commando troop at Faita the far left flank, the 15th Brigade would garrison Kankiryo Saddle, keep contact with the enemy along the Bogadjim Road and patrol along the Kabenau River towards Astrolabe Bay to join the Americans. Finally, the 15th Brigade would "provide a firm base for patrolling, by employing at the discretion of the commander, a force not exceeding one battalion forward of Kankiryo up to and inclusive of Yokopi". The order was ambiguous as far as the local commanders were concerned, and managed to overcome the ban placed by higher authority on any advance across the Finisterres to the coast: Hammer could not go beyond Yokopi but, at the same time, he was to maintain contact with the enemy along the Bogadjim Road—and they were already farther back than Yokopi.

At this point Hammer decided that the supply route from the Saddle to the 57th/60th had to be developed. While the battalion patrolled and the enemy positions were bombarded, Saipa, Yokopi and Daumoina were built into staging areas. In the meantime, patrols from the 2/2nd Commando Squadron were harrying the Japanese from the left flank, successfully establishing a new patrol base at Jappa by March 17th. From there, the Commandos patrolled towards Aminik, Oromuge and Mataloi, which they finally found abandoned. Further east, the 58th/59th Battalion patrolled from the Nangapo and Yangalum areas towards Arawum and Kul 2 as they searched for the Americans at the Kabenau and Kambara Rivers. An accidental meeting had already taken place between the patrols of the two Allies. An American reconnaissance patrol was being towed in a rubber boat by a PT boat with the object of landing at Male and seeing if the Japanese were at Bogadjim. Off Garagassi Point, the tow rope broke and the Americans rowed to shore in their rubber boat which they deflated and hid in the bush near Melamu. Moving inland for about a mile they turned west and nearing the Kaliko Track met Lieutenant Norrie's patrol of the 58th/59th Battalion and accompanied the Australians to Barum, where the Americans were given supplies and a guide; moving via Wenga, they reached Jamjam on the 18th and found no signs of the enemy. On this day at noon about 30 Japanese with three machine-guns and a mortar attacked Norrie's position at Barum. The situation would have been serious had it not been for Sergeant Matheson and his two men who had remained behind at Kaliko and managed to bear the first brunt of the attack and warn those at Barum. The Americans moved on the 20th to Yangalum and next day set out for Kul 2, along almost exactly the same route as that taken by Brewster, who had departed on March 20. Brewster reached Kul 2 on March 21, where he joined the Americans from Saidor and remained with them until the 26th. In this period he went to Saidor where he met General Gill, giving him information about the area east of the Kabenau River and learning of the American intentions and dispositions. Brewster then returned to Yangalum having carried out an important and lengthy linking patrol—35 miles each way.

On the other side, General Adachi ordered his 51st division to continue withdrawing towards Wewak and for the 20th division towards Hansa. There he sought for them to reorganize and receive around 5000 replacements from Palau each. By the 9th, both divisions had reached Bogia and the 20th division had established a new defense of the Hansa area. By mid March the 51st reached Wewak and would be able to assemble at Hansa. On March 20th, the bulk of the 41st division was ordered to withdraw towards Hansa as well. As a result of the invasion of the Admiralty Islands, the 18th army and 4th air army were now cut off from Rabaul. Thus they were reassigned to the 2nd Area Army under the command of General Anami Korechika with his HQ at Ambon. They would be responsible for the defense of the eastern part of the Dutch East Indies and the western portion of New Guinea. General Teramoto would also have to move his command from Wewak to Hollandia.

Back at Yokopi, Hammer anticipated that the constant patrolling and bombardment had forced the Japanese to withdraw from their positions. On March 28th, patrols of the 57th/60th moved past Daumoina and effectively found the enemy gone. The reality, however, was that General Nakai and Colonel Matsumoto had been ordered to pull back and follow its parent unit towards Hansa. The remainder of the 41st Division were following suit over the next few days. Only a 5000-men detachment, deemed the Madang detachment formed around the 239th Regiment, under the command of General Shoge, was left behind to hold Madang and cover the Japanese withdrawal. Hammer ordered the 57th/60th to move forward with speed towards Yaula, yet the Australians would be stopped at the Kofebi River on March 30. In response, a company would be sent in an enveloping maneuver across the river, successfully getting through to Mabelebu although they would be unable to draw away the defenders. During the night, the surrounded company would then have to resist a number of enemy counterattacks, though these weren’t really counterattacks but the Japanese trying to retreat towards Madang. The following day, with the enemy gone, the Australian patrols would rapidly set out north towards Yaula. Meanwhile, the 2/2nd Squadron’s patrols, after securing Mataloi 1, were also advancing towards Yaula with speed. Finally, the commandos would successfully enter Yaula on April 4, with the 57th/60th’s vanguard arriving soon after and then occupying Kwato by nightfall.

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The Bougainville counteroffensive proved the Japanese could still unleash brutal offensives and meet some success. However the level of success was not going to win the war let alone the fight over Bougainville. Within Burma the mixed national armies of the allies were finding some difficult working together, but they were gradually pushing the Japanese back.