Teach Yourself The First World War provides an international perspective on the event that ended in nearly 40 million casualties. Mixing facts with personal war stories, it takes you through the buildup to war and examines the roles of each nation involved. Such topics as trench warfare tactics, spies and espionage, weapons, and casualties are covered in detail. The Teach Yourself History series present all the facts and dates in a dynamic format that enables you to experience and understand the great historic events that shaped, and continue to influence, our world.