After four years of unimaginable horror on the battlefield, the Allies are exhausted and in danger of losing to Germany. General John J. Pershing races to train and deploy the untested American Army before democracy collapses in Europe.

After Germany makes a push to take Paris, America is forced to make hard decisions that will either break the Allies or turn the tide of war. Key regiments known as Big Red One and The Harlem Hellfighters help pave the way to a hard-fought victory.