Big events in history can sometimes seem too complex to understand. This series seeks to simplify confusing historical narratives by focusing on central events, principal causes, main players, and lasting outcomes. World War I introduces readers to this tumultuous period by exploring such topics as alliances in Europe, AustriaHungary, Allied forces, trench warfare, US involvement, major battles, and the consequences of the war. Historical photographs help add context to the text and display images of important events to curious readers. For more summaries of important historical events, check out other titles in the History Summarized series!