- 190 - Pacific War Podcast - Victory on Bougainville - July 8 - 15, 1945

Last time we spoke about the allied invasion of Balikpapan. In June 1945, the war in the Pacific escalated as American forces, spearheaded by Generals Eichelberger and Krueger, fiercely battled the entrenched Japanese on Luzon. Despite harsh conditions and fierce resistance, the Americans made crucial advances, capturing key positions that rekindled hope for the Filipino people. Concurrently, preparations for the invasion of Balikpapan intensified. The Australian 7th Division assembled for a July 1 amphibious assault against a heavily fortified Japanese defense, known for its formidable coast artillery and entrenched positions. The Australians faced fierce opposition upon landing; however, skilled maneuvering and robust artillery support allowed them to swiftly gain a foothold. As the Australians secured their beachhead, they marked the beginning of a challenging campaign against determined Japanese forces in Balikpapan, setting the stage for further confrontations in the Pacific theater. 

This episode is Victory at Bougainville 

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. 

We last left off on Bougainville, by mid-April, Brigadier Heathcote Hammer’s 15th Brigade had commenced its crucial task of relieving Brigadier Field’s weary and battered 7th Brigade. This transition came at a pivotal moment when Brigadier Stevenson’s 11th Brigade successfully secured the Soraken Peninsula, a strategic point on Bougainville's southern coast, while also continuing their efforts to contain enemy forces along the notorious Numa Numa Trail, a crucial supply route for Japanese troops. Supported by reinforcements in artillery and air power, Generals Savige and Bridgeford were optimistic about continuing their limited offensive toward the south. Their immediate objective was to capture the line of the Hongorai River, considered a significant tactical advantage, followed by the Hari River, which would serve as the 15th Brigade’s main aim. On the opposing side, General Kanda had learned a harsh lesson about the ineffectiveness of banzai charges during the fierce fighting at the Battle of Slater’s Knoll. This costly experience prompted him to alter his strategy significantly. He decided to pull his remaining troops back to a defensive perimeter focused around Buin, which is located in the southern region of Bougainville. Here, he reinforced his defenses with garrison troops from Kieta, situated on the eastern side of Bougainville, the Shortlands Islands to the northwest, and the Fauros Islands to the northeast. However, with this concentration of forces not expected to be operational until July, the troops stationed in the forward areas were tasked with executing a critical delaying action in the meantime, buying precious time for reinforcements to arrive.

Meanwhile, on April 17, the Australian 24th Battalion began its advance along the Buin Road, a vital route for both supply and troop movement. Two companies made their way toward Dawe’s Creek, while another company launched an assault against the enemy strongholds at Kindara. Remarkably, they broke through enemy lines the following day, pushing further to Sindou Creek and Umam Creek. Here, they faced multiple sharp counterattacks over the next week, demonstrating the fierce resistance from Japanese forces determined to hold their ground. As patrols moved deeper into the thick jungle on either side of the Buin Road, the struggle became increasingly intense. Each advance was hard-fought, marked by skirmishes that tested the resolve and endurance of the Australian soldiers. Finally, on April 26, the advance resumed in earnest, making rapid gains toward the Hongorai River. The combination of heavy air support and relentless artillery bombardment had effectively dispelled any opposition along the route, allowing the Australians to push forward with renewed vigor.

By May 4, as the 24th Battalion finally approached the banks of the Hongorai River, they encountered significant resistance. However, on the 4th Lieutenant Lawn's platoon was advancing with two tanks and a bulldozer when the crew of the leading tank came to a log across the road and saw movement in the bush. A burst of machine-gun fire from the tank cut the leaves aw