USA HISTORY

Detailed explanation-1: -Originally claimed by several countries (see Oregon Country), the region was divided between the UK and the US in 1846. When established, the territory encompassed an area that included the current states of Oregon, Washington, and Idaho, as well as parts of Wyoming and Montana.

Detailed explanation-2: -The agreement extended the border along the 49th parallel to the Pacific Ocean but kept Vancouver Island within British North America. It was also agreed that British subjects living in the Oregon Territory south of the 49th parallel would retain navigation rights on the Columbia River.

Detailed explanation-3: -In 1848, the U.S. portion of the Oregon Country was formally organized as the Oregon Territory. In 1849, Vancouver Island became a British Crown colony-the Colony of Vancouver Island-with the mainland being organized into the Colony of British Columbia in 1858.

Detailed explanation-4: -At the time the Oregon Territory included all of the present day states of Oregon, Washington, Idaho, and parts of Montana and Wyoming. Its capital city was located in Oregon City, not far from Portland.