History of the Marine Corps

On the morning of February 19th, 1945, the invasion of Iwo Jima began. The Marines were coming in force. The 4th and 5th Marine Divisions led the assault, backed by the 3rd in reserve. Offshore, hundreds of ships filled the sea, their decks crowded with men climbing down cargo nets into landing craft and amphibious tractors. This episode takes us into the brutal opening six days of fighting that marked the start of the thirty-six-day campaign. We’ll set aside Mount Suribachi for now and turn instead to the central and northern fronts, where the hardest battle to secure ground was fought. This is the story of those opening days. The confusion on the beaches, the struggle across the airfields, and the steep price paid for every yard. Iwo Jima had become a trial of endurance, and the battle was only starting. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

By early 1945, the Pacific war had reached a turning point. The United States held the Marianas. From there, B-29 bombers struck directly at Japan, but the road to Tokyo was still dangerous.  Halfway along that road lay Iwo Jima, a tiny volcanic island of black sand, jagged rock, and sulfur fumes. On the map it looked insignificant, but its location gave it enormous weight. For Japan, it was part of Tokyo Prefecture itself, “the doorkeeper to the capital.” For America, it was both a threat and an opportunity: a fighter base that could harass bombers, or an emergency airfield that could save them. General Kuribayashi was ordered to turn Iwo Jima into a fortress. Beneath its surface, his men carved miles of tunnels, pillboxes, and gun positions, prepared to fight to the death. This episode tells the story of that buildup. The strategy, the doubts, the Japanese preparations, and the weight that fell on every Marine the night before the landings. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

The Philippines became the centerpiece of General Douglas MacArthur’s promise to return. The Army was to lead, but when setbacks on Leyte bogged down operations, Marine aviation and artillery were rushed in. Within hours after their arrival, they were flying convoy cover, striking Japanese shipping, and dueling enemy aircraft. Despite crude airfields and poor coordination under Fifth Air Force control, Marines flew over 260 missions in their first few weeks. By campaign’s end, Marine air had won Distinguished and Presidential Unit Citations, reshaped close air support doctrine, and proven indispensable. What began as reinforcement became central to victory, cementing Marine aviation’s legacy in modern warfare. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

The 7th Marines landed on Peleliu under the command of Colonel Herman H. Hanneken. Veterans of Guadalcanal and Cape Gloucester, they now faced a new kind of hell. Their mission was to seize the island’s eastern shore, then pivot south to clear Japanese positions threatening the airfield. Over weeks of unrelenting combat, they fought through blockhouses, mangrove swamps, and the notorious Bloody Nose Ridge, in brutal, close-quarters action. Acts of valor, like PFC Arthur J. Jackson’s Medal of Honor assault, stood against staggering casualties, disease, and exhaustion. The episode follows the 7th Marines from their D-Day landing through the grinding fight inland, their eventual relief, and the debate that still surrounds whether Peleliu was worth the cost. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

In this episode, we examine the 5th Marine Regiment’s role in the brutal Battle of Peleliu. As part of the 1st Marine Division, the 5th Marines were tasked with seizing the island’s strategically vital airfield. They advanced across open terrain under withering fire, securing the airfield despite intense Japanese resistance and extreme environmental conditions. By mid-October, after nearly a month of combat, the 5th Marines were physically spent and heavily depleted.  ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

In this episode, we explore the brutal experience of the 1st Marine Regiment during the early days of Peleliu. Under relentless enemy fire, Marines fought their way across beaches and through rugged coral ridges against deeply entrenched Japanese defenders. They endured extreme heat, devastating casualties, and severe logistical challenges that tested their limits. In the fierce fighting at Peleliu, Marines showed remarkable bravery, repeatedly risking their lives to protect their fellow brothers. Although the Marines achieved critical early goals, their losses were so heavy that the regiment eventually had to withdraw. Their sacrifices made the critical difference, paving the way for other Marine units to finish the fight, especially the battle for the island’s crucial airfield. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

Peleliu was part of the Allies' island-hopping campaign to capture key islands and build forward bases on the path to Japan. Expected to last only a few days, the battle instead turned into one of the Pacific War’s longest and bloodiest fights. The island was strategically critical because of its airfield, needed for Allied operations and protecting General MacArthur’s flank during his return to the Philippines. Japanese defenders, entrenched in sophisticated fortifications including caves, tunnels, and reinforced bunkers, fiercely resisted the Marine landings. The rugged coral terrain and oppressive heat further complicated operations, pushing Marine endurance to the limit. The 1st Marine Division, seasoned from previous campaigns at Guadalcanal and Cape Gloucester, faced intense close-quarter combat. Their resilience, adaptability, and courage under extreme conditions exemplified the brutal realities of island warfare, marking this battle one of the costliest and hardest-fought in Marine Corps history. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

Last episode, we walked through the intense landing at Tinian and how Marines clawed their way inland. Once they secured crucial positions, they wasted no time driving south, dismantling Japanese defenses one step at a time. Today, we'll conclude our Tinian series by exploring the campaign's dramatic final stages. We'll cover fierce clashes along rugged cliffs, relentless enemy resistance, and logistical adaptations in the face of severe weather. We'll examine critical innovations in artillery coordination, amphibious logistics, and the first use of napalm in combat. Ultimately, the strategic capture of Tinian transformed the island into a pivotal airbase for the devastating B-29 campaign against Japan, including the missions to Hiroshima and Nagasaki. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

In this episode, we explore the strategic battle for Tinian, a crucial turning point in the Pacific War. As Marines launched an ambitious assault, intense artillery and naval bombardments battered Japanese defenses, paving the way for a daring landing on narrow northern beaches. Marines overcame challenging terrain and fierce resistance to secure critical positions such as Mount Lasso and Ushi Point Airfield.  Despite setbacks, including tragic losses from artillery fire, Marine forces advanced steadily inland. With control of vital airfields and fresh reinforcements arriving, the Marines prepared for the final, decisive push against desperate enemy holdouts on the southern cliffs—setting the stage for the dramatic conclusion ahead.  ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

In early August 1944, the 77th Division prepared to launch a critical attack against Japanese defenses near Mount Santa Rosa. As enemy troops fell back into thick jungle cover, General Bruce carefully arranged his forces for one last, determined push. US troops overcame intense resistance and moved steadily toward crucial objectives. The capture of Mount Santa Rosa marked a turning point in Guam’s liberation. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

After weeks of brutal combat, relentless bombardment, and fierce resistance, the Japanese momentum on Guam finally collapsed. In this episode, we explore how a seemingly unstoppable Japanese counterattack quickly unraveled, leaving scattered, leaderless troops desperately hiding in caves and jungle ravines.  Cooks, clerks, and engineers stepped boldly into the breach. Ahead lay brutal struggles for Orote Peninsula, the strategic town of Sumay, and vital airfields that symbolized Guam's liberation.  ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

After weeks of relentless fighting, Saipan fell into American hands. The strategic island of Guam was next, heavily reinforced and waiting. The enemy had fortified every possible landing spot, preparing meticulously for another bloody defense. Delays added frustration, but also time for crucial adjustments. On July 21, 1944, the Marines finally hit Guam’s beaches under a storm of enemy fire, instantly facing familiar brutality: concealed bunkers, merciless artillery, and a stubborn enemy refusing to yield. Saipan’s scars were fresh, and now Guam promised more of the same. Yet Marines fought forward with grim determination, knowing this island was key to turning American bombers loose against mainland Japan.  ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

By early July 1944, the brutal fight for Saipan had narrowed to a violent, grinding finish at the island's northern tip. Japanese troops, trapped and desperate, fought with unyielding fanaticism, determined not to surrender a single inch.  Hidden machine guns, suicide charges, and ruthless ambushes took a devastating toll. Costly errors opened dangerous gaps, quickly exploited by relentless enemy counterattacks. This final, savage showdown would push each Marine and soldier to their breaking point, making Saipan one of the hardest-earned victories, and bloodiest chapters, of the Pacific War. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.  

In this episode, American forces on Saipan face intense Japanese resistance as they push northward toward Marpi Point. On July 6, soldiers from the Army’s 27th Infantry Division find themselves trapped in brutal combat near Tanapag and Harakiri Gulch, encountering relentless fire from deeply entrenched enemy positions. As tanks struggle against mines and ambushes, the division's momentum stalls, prompting desperate tactical decisions. Meanwhile, the 4th Marine Division continues advancing steadily eastward, capturing crucial high ground that places further pressure on the Japanese defenders. But as darkness falls, gaps emerge in American lines, leaving troops vulnerable to infiltration. With the Japanese preparing for one last, desperate counterattack, the battle for Saipan reaches a critical turning point. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

As Marines advanced across Saipan, the naval battle for the Marianas reached a critical turning point. On June 19, despite dominating enemy aircraft in the "Great Marianas Turkey Shoot," American ships faced Japanese coastal artillery and nighttime air raids. Meanwhile, Admiral Spruance launched a daring, long-range strike against retreating Japanese carriers, dealing devastating blows but suffering heavy aircraft losses. On Saipan itself, fierce ground fighting continued, with Marines battling stubborn Japanese defenses across rugged terrain, while rising tension between Marine and Army commanders foreshadowed controversial command decisions ahead. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

With Saipan’s beaches secured but far from safe, Marines now faced the brutal inland fight. The Japanese launched desperate tank assaults near Red Beach with the goal of driving Americans back into the sea. Marine bazooka teams and grenadiers met the threat head-on. By dawn, the cost was clear: hundreds of enemy dead, rising Marine casualties, and the realization that Saipan would be a grinding, bloody fight. Reinforcements landed, artillery emplacements expanded, and command began shifting ashore. With the beachhead now stable, the Marines prepared for the next brutal push inland toward ridgelines, sugar mills, and enemy strongholds. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

Across the Pacific, Marines had fought fiercely to gain strategic positions that put Tokyo within reach. But the road had been costly, each step paid for in blood, sweat, and sacrifice. Now, all eyes were on the Marianas, a critical chain of islands that would determine the next phase of the war.  This episode dives into the complex planning and intense buildup to the Saipan invasion. We’ll walk through the strategic debates between military leaders whose decisions shaped the Pacific campaign. We’ll see how reconnaissance shortfalls and underestimated enemy strength set the stage for one of the toughest fights Marines had yet encountered.  Most importantly, we’ll join the Marines themselves, landing under merciless artillery fire, facing relentless resistance, and overcoming chaotic conditions to gain a fragile foothold. Their determination amid confusion and heavy losses highlights why Saipan remains one of the Corps’ defining moments. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

The Marines barely had time to catch their breath after Kwajalein before their attention shifted northwest to Enewetak Atoll. Four islands in particular stood as crucial targets, heavily defended by thousands of Japanese troops racing to build defenses strong enough to repel any invasion.  Initially, commanders planned the attack for months later, but fresh aerial reconnaissance and captured enemy maps showed that waiting would only strengthen Japanese defenses. With detailed intelligence and thousands of battle-tested Marines at their disposal, commanders swiftly made their decision: hit Enewetak immediately.  As Marines stormed beaches through heavy naval bombardment and air strikes, they quickly realized they'd underestimated the enemy strength, setting the stage for one of their toughest fights yet in the Pacific. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

At Kwajalein and Roi-Namur, months of rehearsals, better intel, and hard-earned Tarawa lessons came together. The 4th Marine Division, fresh off the boat from Pendleton, made its combat debut alongside Army units already blooded in the Aleutians. They landed under real air cover, backed by real logistics, and fought smart, clearing bunkers with tanks and torches instead of charging into fire. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.

After the brutal learning curve at Tarawa, the Marine Corps came into this fight prepared, equipped, and determined to lead the next phase of the war. For the first time, their landings were backed by meaningful fire support and rehearsed coordination. The chaos of earlier battles gave way to calculated strikes. This episode follows their path from the surf of Roi-Namur to the contested terrain of Kwajalein. Along the way, we’ll explore the courage that carried them forward, the lessons that reshaped their doctrine, and the heroism that defined this campaign. ************* Visit HistoryoftheMarineCorps.com to subscribe to our newsletter, explore episode notes and images, and see our references. Follow us on social media for updates and bonus content: Facebook and Twitter (@marinehistory) and Instagram (@historyofthemarines). Visit AudibleTrial.com/marinehistory for a free audiobook and a 30-day trial.