At the beginning of the 19th century, Sacagawea was an 11-year-old Shoshone Indian girl gathering roots and berries when she was kidnapped by Hidatsa warriors. She joined a Hidatsa household and a few years later married a French Canadian fur trapper. Then one day, white explorers came to Sacagawea's camp. The leaders of the white men were Meriwether Lewis and William Clark. They had been sent by President Thomas Jefferson to find a way across America. Sacagawea, her husband, and their newborn son joined the white men as guides. As the journey went on, the brave Sacagawea helped the explorers survive many hardships-and became a legend in the process.