| Term | Definition |
| Sakakawea | captured during a Hidatsa raid to the west & brought back to the Knife River villages |
| Black Cat | Known as the "Grand Chief: of the Mandan |
| Toussaint Charbonneau | French fur trader & married to Sakakawea |
| Alexander the Younger Henry | in 1800 built the 1st permanent post in present day ND |
| Manuel Lisa | in 1809 build the 1st American post in ND |
| Kenneth McKenzie | Managed Fort Union & was known as the "King" of the upper Missouri region |
| David Thompson | Noted for making the 1st map of the region |
| Pierre LaVerendrye | 1st white explorer to record a visit in present-day ND |
| Karl Bodmer | Made painting of American Indian life & their surroundings |
| John Evans | In 1796 led important exploration to the Upper Missouri region |
| Bird Woman | Indian name for Sakakawea |
| Tenant Trader | Name given to white fur traders who lived with the Indians |
| Corps of Discovery | Expedition that explored Louisiana Purchase |
| Keelboat | Boat 50-80 ft. long, used on Missouri River to transport goods |
| Confluence | Meeting place of two rivers |
| Louisiana Purchase | Large tract of land sold by France to US in 1803 |
| "North Trader" | Traders from various trading companies who traded with native peoples |
| "Like-a-Fishook" | Village started by Manda & Hidatsa after the smallpox epidemic |
| Yellow Stone | First steamboat in the Upper Missouri region |
| Interpreter | Someone who converts one language into another |