"The Great War Comes" takes the viewer back to the early days of German industrial development in the late 19th and early 20th centuries, the development of its overwhelmingly impressive armaments industry, including major ocean-going battleships and the planes that would become part of World War I lore. It details the initial development of chemical weaponry in Germany by German scientists and engineers, and culminates in the use of Germany's massive weaponry in World War I, the "Great War" that killed millions in the greatest and most widespread conflagration the world had ever known.