It was wide spread series of unofficial ceasefires along the Western Front of WW1 around Christmas.
“The Oregon Treaty[1] is a treaty between Great Britain and the United States that was signed on June 15, 1846, in Washington, D.C.. The treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to the Oregon Country; the area had been jointly occupied by both Britain and the U.S. since the Treaty of 1818.[2]” hope this helps
These areas had really never been mapped out, and if they were then they were not accurate.
