Many countries around the world were first explored by men and women eager to claim land for their home country. The United States had many explorers who discovered important parts of the country and brought back tales of varied landscape and different cultures. The most well-known explorers of the 1800s were Meriwether Lewis and William Clark. Read all about their lives and what it was like to explore the western United States back then. This book gives an engaging perspective on America's history, with vivid photographs and illustrations, a detailed glossary, and simple text.