Episode 4 - Rage 1917. People are fed up with war. In the rear the revolts rumble, like that which overthrows the Tsar in Russia; On the front the mutinies multiplied, like that of Chemin des Dames in France. In the Atlantic, the ravages of German submarines will drag Americans into the war. In Belgium, it is the hecatomb of the battle of Passchendaele for thousands of soldiers of the British Empire.