The Harley-Davidson Flathead isn't just a motorcycle engine—it's a piece of American history. From the Great Depression to World War II battlefields, this iconic V-twin carried Harley-Davidson and its riders through the most pivotal moments of the 20th century.br br In this in-depth video, we explore the rise, legacy, and cultural impact of the Flathead—from the 1929 Model D to the military WLA “Liberator” to the post-war chopper scene. We cover key models like the UL, WLA, and Servi-Car, and show how this humble side-valve engine became the backbone of a motorcycle revolution.br br Whether you're a vintage Harley collector, a military vehicle enthusiast, or a fan of American motorcycle culture, this is one story you can’t miss.br br 🔥 Subscribe for more American motorcycle history, custom bike culture, and rare Harley-Davidson deep dives.br 👍 Like, 💬 Comment, and 🔔 Hit the bell so you never miss a ride into the past.