World War I is known as the “war to end all wars.” In this title readers will get a first had look at life in the trenches. Primary sources, data, and research are used to explain the horrors that took place in them, as well as sanitary conditions, structure, and soldier assignments. Aligned to Common Core Standards and correlated to state standards. Abdo & Daughters is an imprint of Abdo Publishing, a division of ABDO.