Last time we spoke about the fall of Wewak. In June 1945, Allied forces, led by General George Stevens, intensified their campaign to capture the strategic town of Wewak in New Guinea. After years of grueling combat, they relentlessly pressed against entrenched Japanese defenses, including the remnants of General Mano's 41st Division. The Australians achieved critical victories by securing vital supply routes and establishing new airfields, facilitating their advance. By May 8, after intense fighting, Australian troops effectively seized Wewak Point, eliminating entrenched Japanese soldiers in bunkers and caves. Despite suffering casualties, the Australians distinguished themselves through bravery and tactical ingenuity. Ultimately, the successful capture of Wewak marked a pivotal moment in the Pacific campaign, showcasing the determination and spirit of the Allies as they pushed towards victory in the Pacific Theater, bringing an end to a crucial chapter of the war.

This episode is Operation Downfall

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. 

After the fall of Okinawa, the Allies were mopping up campaigns across the Asia-Pacific and planning for what was assumed to be the most cataclysmic battle yet, the invasion of the Japanese home islands. First we are going to travel back to Luzon. By mid-June, General Krueger’s 6th Army had successfully captured all key objectives in northern Luzon, southern Luzon, and the area east of Manila, which serves as the capital of the Philippines. Although General Yokoyama’s poorly equipped 41st Army had been rapidly scattered and forced into hiding, General Yamashita’s Shobu Group still retained enough strength to continue its resistance in northern Luzon. The Shobu Group was primarily gathering its units in a desperate last-stand position along the rugged valley of the Asin River, an area known for its difficult terrain. Interestingly, General Krueger underestimated Yamashita's strategic intentions, still expecting him to make his final stand in the Cagayan Valley, located in the northern part of Luzon. With this assumption, Krueger believed that if General Beigthler’s 37th Division could maintain its rapid advance towards Aparri, situated at the northern tip of Luzon, they might be able to conclude the Luzon Campaign in a pivotal stroke.

However, intelligence indicated that units of the Shobu Group were retreating into the Cordillera Central mountain range, a formidable natural barrier, located between Routes 4 and 11. In response, Krueger ordered the 1st Corps to exert strong pressure on this mountainous region from the north, south, and west. To implement this strategy, General Swift directed the 6th, 25th, and 33rd Divisions to clear the supply route between Baguio and Aritao, ultimately sealing off Yamashita's last-stand position from the south. Meanwhile, Colonel Volckmann's guerrilla forces were instructed to advance east from Cervantes to capture the crucial junction of Routes 4 and 11 at Sabangan. Recognizing the importance of controlling key roadways, the 63rd Regiment was tasked with pushing up Route 4 to seize the strategic location of Kiangan. In the south, the 130th Regiment began probing southeast towards Pigkian, while the 20th Regiment continued to apply pressure on the remnants of the now-battered 2nd Tank Division. Ultimately, General Iwanaka’s weakened forces narrowly avoided entrapment along the Bambang-Pingkian road, retreating northward via treacherous mountain trails and river valleys. They reached the Tubliao area just as early July arrived, illustrating the persistent and relentless nature of this campaign.

Looking northward from Cervantes, Volckmann’s guerrilla fighters launched attacks toward both Mankayan and Sabangan. By the end of June, their efforts had pressured the beleaguered 19th Division to hastily withdraw from Bontoc, a significant town located in central Luzon, and Sabangan. However, General Ozaki’s forces maintained a formidable defensive position at the Lepanto Mine, an area known for its mineral wealth and strategic significance. On June 16, the 63rd Regiment began its advance up Route 4, which runs north through the central highlands toward Kiangan, a town that was critical for controlling the region. By the evening of the following day, American forces had successfully breached the defensive line established by the 105th Division at the Rayambugan Farm School, a local educational institution that was repurposed for military use during the conflict. Continuing their push, the 63rd Regiment encountered the main defenses of General Tsuda on June 19 along Route 4. However, over five days of fierce fighting, utilizing only one battalion for the attack, gained little ground for the Americans. Recognizing the need for greater force, they reinforced their assault on June 24. By June 26, the 63rd began to break through towards Hucab, a small settlement, and by June 29, they had overcome the last organized resistance in the area.

Meanwhile, the 37th Division also made significant advances. Resuming its drive up Route 5 on June 17, the 148th Regiment successfully pushed forward to Naguilian, a town that marks a key waypoint on this route. Two days later, the front-line troops reached Bangag, yet here they encountered increased resistance. They were now facing elements of Major-General Yuguchi Shuntaro’s 80th Brigade, which was attempting to move south along Route 5. In a series of running engagements from June 19 to 23, the 37th Division inflicted heavy casualties, killing over 600 Japanese soldiers and capturing nearly 285 more in the challenging fifteen-mile stretch between Bangag and Balasig. The remnants of the Yuguchi Force were ultimately forced to retreat eastward into the rugged and uncharted wilderness of the Sierra Madre mountain range, illustrating the intense and chaotic nature of the conflict.

General Krueger deemed it essential to execute an airborne operation over the northern Cagayan Valley to ensure the success of the 37th Division's advance. It’s possible that Krueger’s motivation also stemmed from a desire to secure northern Luzon before the 8th Army took control of operations, which was scheduled for July 1. Despite contrary reports from various sources, including the United States Armed Forces in the Philippines Northern Luzon, 1st Corps, the 37th Division, and ALAMO scout teams, Krueger concluded that Japanese forces in the Cagayan Valley were retreating "in wild disorder on Highway 5 towards Aparri." It’s worth noting that, in actuality, the general movement of Japanese troops had been southward for weeks, and no Japanese unit intended to take refuge in Aparri, a flatland area surrounded by mountains that made it a poor defensive position. Based on his assessment of the situation, Krueger decided that in order to achieve the complete destruction of the fleeing enemy forces, he would launch a vertical envelopment of airborne troops to close any escape routes and prevent the Japanese from evading capture in Aparri. Consequently, on June 21, Krueger ordered a battalion combat team from the 511th Parachute Infantry of the 11th Airborne Division to parachute near Aparri on June 23. However, on June 21, the Connolly Task Force entered Aparri without facing any opposition. By the evening of June 22, elements of the Task Force had advanced ten miles south along Route 5, managing to secure the Camalaniugan Airstrip, a crucial airfield integral to the logistics of both sides. Despite the successes of the reinforced Connolly Task Force, Krueger did not change his mind about the desirability and necessity for the airdrop. Instead, he concluded that the "seizure of Aparri without opposition by elements of the Connolly Task Force on 21 June 1945, together with the almost unopposed advance of the 37th Division, indicated clearly that the time had come for mounting the airborne troops to block the enemy's retreat in the Cagayan Valley." It is not clear just what retreat Krueger expected to block.

On the morning of June 23, the paratroopers dropped into Camalaniugan unchallenged and immediately began their advance southward to make contact with the 37th Division. That same day, the 129th Regiment took over the offensive, heading north towards Tuguegarao, a significant town in the region. Tuguegarao fell without resistance by June 25. By nightfall, forward elements of the 129th had pushed ten miles beyond Tuguegarao, reaching the town of Iguig. The following day, June 26, the forces made contact with the paratroopers at the Paret River, further solidifying their position. By the close of June, Japanese resistance in the Cagayan Valley had subsided, and General Yamashita’s Shobu Group, still capable of fighting, found itself encircled in a last-stand area that would become known as the Kiangan Pocket, named by the Filipino-American forces engaged in its reduction. As the campaign progressed, the last elements of the 25th and 33rd Divisions were relieved. General Gill’s 32nd Division took over control of the Baguio-Ambuclao sector, while the bulk of General Hurdis’ 6th Division assembled at Hucab. This marked a significant transition as it signaled the concl