First Diesel-Electric Streamliner Debut

On May 20, 1931, the Union Pacific Railroad unveiled the M-10000, America's first diesel-electric streamliner, at a ceremony in Omaha, Nebraska. This articulated three-car train, powered by a 600-horsepower Winton engine, featured lightweight aluminum construction and a sleek Art Deco design by architect Walter Dorwin Teague. It achieved speeds over 100 mph during trials, cutting travel times on routes like Chicago to the West Coast. The innovation addressed the Great Depression-era need for efficient, modern transport and inspired a wave of streamlined trains across the US, including the Burlington Zephyr. Its success helped shift railroads from steam to diesel power, improving reliability and passenger appeal for decades.