In this episode, Sean and James explore how World War I spread beyond the Western Front into a truly global conflict. They trace massive campaigns across Eastern Europe, where Germany and Austria-Hungary drove deep into Russian territory, and in the West, where repeated Allied offensives in Artois, Champagne, and Ypres failed to break the stalemate. The episode also covers the fall of Serbia, the opening of the Salonika Front, Italy’s entry into the war, and the British advance up the Tigris that led to the siege of Kut-al-Amara. By the end of 1915, millions were dead or displaced, and it had become clear that the war would be long, brutal, and worldwide in scale.