the dispute (1818-1846) between Great Britain and the United States over the Oregon country, settled by division at the present British Columbia-Oregon border.
1846  The Oregon Question absorbs all others. . . .
1881  These troops were probably sent to defend the frontier line owing to the fuss made by the Americans at the time on the Oregon question.
1908  But perhaps the most notoriously absurd part the [Hudson's Bay] Company ever played internationally was in connection with what is known as "the Oregon question."