Toussaint Charbonneau was a French-Canadian fur trader and explorer born in 1767. He is best known for his role as a guide and interpreter during the Lewis and Clark Expedition, which took place from 1804 to 1806. Charbonneau was married to Sacagawea, a Shoshone woman who also played a crucial role in the expedition by helping the explorers communicate with Native American tribes. Charbonneau's skills in navigation and knowledge of the land were valuable to the expedition team. After the journey, he settled in the Missouri River area, where he continued to work in the fur trade until his death in 1843.