Discusses the build-up to the war, along with battles, history, technology, and more. Fun facts, amazing pictures, quizzes.

Includes index.

Taking sides -- War begins -- Key players -- Off to war -- Two fronts -- War horses -- Trench warfare -- A day in the trenches -- Battles at sea -- Battles in the skies -- Air aces -- Wartime intelligence -- Spying -- Uniforms -- Gas warfare -- Gallipoli -- Women in wartime -- Desert fighting -- Two great battles -- Tanks at war -- The US at war -- Russian revolution -- War propaganda -- Recording the war -- The last battles -- Peace at last -- Remembering the war -- World War I facts and figures.