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| 10062922833 | Sacagawea | A Shoshone woman who went on the lewis and clark expedition |  | 0 |
| 10062929553 | Meriwether Lewis | He and William Clark led an expedition from the Mississippi River to the Pacific Ocean |  | 1 |
| 10070560476 | William Clark | The other leader of the Lewis and Clark expedition. He and his partner, Meriwether Lewis, were sent by Thomas Jefferson to explore the Louisiana Territory. | 2 | |
| 10070566806 | Appalachian Mountains | A mountain range that was used as a boundary for the Proclamation of 1763. | 3 | |
| 10070569300 | Manifest Destiny | A belief in the early 1800s that the United States should own all the land from the Atlantic to the Pacific. | 4 | |
| 10070574330 | Louisiana Purchase | The territory purchased by the Americans from the French in 1803. The main reason for the purchase was the French needed money for their war with the British. | 5 | |
| 10070585653 | The Battle of Fallen Timbers | 1794, struggle between American Indians and the United States for control of the Northwest Territory. | 6 | |
| 10070586339 | Cumberland Gap | Daniel Boone used this route (Gap) through the Appalachian Mountains, and it became Wilderness Road. | 7 | |
| 10070589523 | Zebulon Pike | Explored the southern part of the Louisiana Territory. He has a peak named after him, over 14,000 ft. | 8 | |
| 10070591827 | Thomas Jefferson | Wrote the Declaration of Independence, 3rd President of the United States, and sent Lewis and Clark on their expedition. | 9 | |
| 10070600406 | Pioneer | A person who is among the first to explore or settle a new country or area. | 10 | |
| 10070600912 | Greenville | A treaty that opened most of Ohio to white settlers. | 11 | |
| 10070602715 | York | Clark's slave and explored with Lewis and Clark. | 12 |
