Always faithful, the United States Marine Corps is the first in and the last to leave. Explore the proud history and traditions of the U.S. Marine Corps through the lens of their official song, "The Marine's Hymn." Sidebars and callouts honor the legacy and impact of Marines throughout our nation's history and today. Readers will learn about the brave men and women who help make this the land of the free and understand the pride our nation feels for our fighting forces. Simple activities encourage students to Look, Think, Make a Guess, Ask Questions, and Create. The combination of reading and inquiring helps readers develop the skills needed to master content, allowing them to build knowledge and succeed in the 21st century.