This Trains Unlimited marathon explores how railroads reshaped history—from their transformation into vital wartime machines to the rise of steam power and the global race for faster trains. Travel through 160 years of innovation, meet the people who kept these Iron Horses running, and witness the evolution from steam to diesel and beyond. #HISTORY #TrainsUnlimited Don't miss a video! Subscribe NOW: https://www.youtube.com/@HISTORY?sub_confirmation=1 ABOUT THE HISTORY CHANNEL: The HISTORY® Channel, a division of A+E Global Media, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. FOLLOW HISTORY CHANNEL: Watch Full Episodes: https://www.history.com/videos Sign Up For History Emails: https://www.history.com/emails/sign-up Browse Topical Videos: https://www.history.com/topics Facebook: https://www.facebook.com/HISTORY/ Instagram: https://instagram.com/history TikTok: https://tiktok.com/@history X: https://twitter.com/history YouTube: https://www.youtube.com/@HISTORY Copyright Notice: This video and my YouTube channel contain dialog, music, and images that are property of The HISTORY® Channel. You are authorized to share the video link and channel, and embed this video in your website or others as long as a link back to our YouTube Channel is provided. © 2025 The HISTORY® Channel Steam, Speed & War Machines | Trains Unlimited *MARATHON* https://www.youtube.com/@HISTORY/