"This We'll Defend." This is the motto of the United States Army, the main land defense of the United States. This hi/lo title allows readers to learn about the oldest military branch, the Army. Organized chapters define and introduce the branch, discuss tools and equipment, and describe important missions the Army has completed. A map highlights the location of the Army's largest bases. Profiles give snapshots of a piece of equipment and a mission. The book rounds out with a full-spread profile of the branch, covering basic statistics, the year the Army was established, and more.