Explore the fascinating history of America's first World War, meet the greatest military leaders and tacticians, and learn about key battles in this compelling new book in the popular Everything series. Each book in the National Geographic Kids Everything series has more than 100 pictures, an explorer's corner with from-the-field anecdotes and tips, fun facts throughout, maps and infographics, an illustrated diagram, a photo gallery, cool comparisons, a behind-the-scenes photograph, an interactive glossary, and more. This book marks the 100th anniversary of WWI and takes a thoughtful, kid-friendly approach to a serious subject.