How did mandan and Sacajawea help the exepition?

The Mandan people provided essential support to the Lewis and Clark Expedition by offering shelter, food, and valuable information about the surrounding terrain and resources. Sacajawea, a Shoshone woman who accompanied the expedition, played a crucial role as a translator and guide, facilitating communication with various Native American tribes and helping to navigate through unfamiliar territories. Her knowledge of the land and survival skills greatly contributed to the expedition's success. Together, the Mandan and Sacajawea helped ensure the expedition's survival and progress.