The scale and intensity of the conflict was unprecedented, with more men fighting and more casualties than any previous human conflict. Of the 70 million soldiers who took part in the fighting, 60 million were Europeans. New technologies machine guns, better artillery, advanced logistics, poison gas, aerial warfare and submarines increased the scale of the carnage to a level the world had never seen before.This fascinating program charts all the major events, defining actions and key personalities that decided the course of World War I and id a must-watch for anyone interested in military history.