How many soldiers fought in World War I? What new a deadly weapons did they use? How were civilians affected by the war? From 1914 to 1918, a devastating war shook the world. This book examines the causes and effects of the war, and looks at the people who fought and suffered. Weapons, tactics, and medicine all played a role in making this one of the deadliest wars of all time. Find out what it was really like for the people who lived through it.