What disputed territory did clark and Lewis travel through in 1805 and 1806?

In 1805 and 1806, Meriwether Lewis and William Clark traveled through the Oregon Country, a disputed territory at the time claimed by both the United States and Great Britain. This area encompassed the Pacific Northwest, including parts of present-day Oregon, Washington, and British Columbia. Their expedition was part of the larger effort to explore and map the newly acquired lands from the Louisiana Purchase. The Oregon Country ultimately became a focal point of territorial disputes between the two nations until it was settled in the 1846 Oregon Treaty.