Travel with the famous explorers who made monumental discoveries that have affected life today. Learn about the missions that made these people famous, and the hardships they endured on their journeys. This book follows the life and adventures of Sacagawea, a Shoshone. In 1804 Sacagawea joined the Lewis and Clark expedition called the Corps of Discovery, which traveled uncharted territories of North America. The expedition began its search for a water route to the Pacific Ocean. Along the way, Sacagawea helped the expedition by acting as an interpreter and guide.