Across
- 3. an American explorer, soldier, Indian agent, and territorial governor
- 5. an American career Army officer and politician, who served as governor of the Territory of Washington from 1853 to 1857
- 7. an American businessman, real estate developer, investor, inventor, writer, lieutenant colonel in the Spanish–American War, and a prominent member of the Astor family
- 8. the first Governor of the U.S. State of Washington
- 11. The Convention respecting fisheries, boundary and the restoration of slaves between the United States and the United Kingdom, also known as the London Convention and Anglo-American Convention
- 14. a Canadian retail business group
- 18. a conflict between the United States and the Yakama, a Sahaptian-speaking people of the Northwest Plateau, then part of Washington Territory, and the tribal allies of each
- 19. a U. S. Army post in the Washington Territory
- 20. an entrepreneur and a politician, regarded as a founder of the city of Seattle
- 23. a widely held cultural belief in the 19th-century United States that its settlers were destined to expand across North America
- 24. a Suquamish and Duwamish chief
- 25. a meeting in the Pacific Northwest between the United States and sovereign tribal nations of the Cayuse, Nez Perce, Umatilla, Walla Walla, and Yakama
Down
- 1. a 19th-century fur trading post that was the headquarters of the Hudson's Bay Company's Columbia Department, located in the Pacific Northwest
- 2. a Spanish Basque explorer of the Pacific Northwest
- 4. a confrontation in 1859 between the United States and United Kingdom over the British–U.S. border in the San Juan Islands, between Vancouver Island and the State of Washington.
- 6. a Lemhi Shoshone woman who, at age 16, met and helped the Lewis and Clark Expedition in achieving their chartered mission objectives by exploring the Louisiana Territory
- 9. North West Company. Founded in 1779, the North West Company was a major force in the fur trade from the 1780s to 1821
- 10. a British explorer, navigator, cartographer, and captain in the British Royal Navy
- 12. the encampment of the Lewis and Clark Expedition in the Oregon Country near the mouth of the Columbia River during the winter of 1805-1806
- 13. a breed of otter
- 15. a point jutting into Puget Sound, the westernmost landform in the West Seattle district of Seattle, Washington
- 16. a United States policy that opposed European colonialism in the Americas. It began in 1823
- 17. a multiancestral indigenous group whose homeland is in Canada and parts of the United States between the Great Lakes region and the Rocky Mountains
- 21. a United States statute that permitted the entrance of Montana and Washington into the United States of America, as well as the splitting of Territory of Dakota into two states: North Dakota and South Dakota
- 22. a mountain pass in the northwest United States, through the Cascade Range in Washington