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Watch Modern Marvels Season 9 Episode 40 Online

  • 8.5/10
  • COUNTRIES: United States of America
  • Subtitles: English

Examines how the great 19th-century peacetime invention developed into a powerful war machine, forever altering how, when, where, and why battles were fought. Also looks at the brave men and women who kept the military Iron Horses running, often at their own peril.