An assassin's bullet starts a global conflict that escalates into a deadly war; a new generation of soldiers emerges, including future world leaders such as Winston Churchill, Charles De Gaulle, Adolf Hitler, Benito Mussolini, and Joseph Stalin; tanks and chemical weapons enter the battlefield.

The Allies turn Germany away from France; leaders are dissatisfied with the Treaty of Versailles; Germany's economy collapses with the end of the war; Hitler begins his rise to power; Lenin overthrows the tsarist government in Russia.

The entire world plunges into an economic depression; Josef Stalin seizes power; Japan makes plans to dominate Asia; Adolf Hitler begins taking back the territory Germany lost.