The Sacagawea dollar is a United States dollar coin that was first released in 2000 to replace the Susan B. Anthony dollar. Sacagawea was the Shoshone Indian who assisted the historic Lewis and Clark expedition. Sacagawea is depicted on the obverse of the coin, carrying her infant son, Jean Baptiste Charbonneau, on her back. Sacagawea joined the Lewis and Clark expedition six months pregnant and gave birth to Jean Baptiste early in the journey. Pompeys Pillar on the Yellowstone River in Montana (William Clark nicknamed him "Pomp") and the community of Charbonneau, Oregon are named after him.
