Answer:
The United States and Great Britain settled the Oregon question by establishing a boundary at the 49th parallel, through the signing of the Oregon Treaty.
Step-by-step explanation:
The Oregon Treaty of 1846 was signed on June 15, 1846 in Washington DC, and established the border between the British and American sections of the "Oregon Territory". This had been jointly occupied by the British and Americans since the Anglo-American convention of 1818 when a common domain of the region was agreed. US President James K. Polk introduced the motto "Fifty-Four Forty or Fight!" In the federal elections of 1844, referring to the latitude line that should form (and should have been) the northern border of the state of Oregon.
The treaty was negotiated by James Buchanan, US Secretary of State, and Richard Pakenham, member of the royal council of Queen Victoria and special envoy of the queen.
It was agreed that the territory to the north of 49 ° N was British with the name of British Columbia, and the territory to the south of the mentioned parallel and until the 42nd N parallel remained American with the name of Oregon Territory.