| A | B |
| inauguration | the act or ceremony of installing a person in office. |
| pathfinder | someone who finds a way through an unknown region |
| trespassing | going into someone's property without asking |
| Louisiana Purchase | A huge part of the middle United States bought from France |
| Thomas Jefferson | The 3rd President of the United States |
| Lewis and Clark | Explorers who explored the Louisiana Purchase for President Jefferson |
| Sacaguwea | Shoshone Indian woman who guided Lewis and Clark |
| Corps of Discovery | The large group of explorers who explored the Louisiana Purchase along with Lewis and Clark |
| Years Lewis and Clark explored the Louisiana Purchase | 1804-1806 |
| Zebulon Pike | Explored the Southwest part of the Louisiana Purchase |
| War of 1812 | War between the United States and England |