17th parallel north line between North and South Vietnam established by the Geneva Accords of 1954. The demarcation line did not exactly coincide with the 17th parallel but ran south of it, approximately along the Bến Hải River in Quảng Trị Province to the village of Bo Ho Su and from there due west to the Laos–Vietnam border. In 1976 the demarcation line was made irrelevant as Vietnam was unified following the withdrawal of American forces and the surrender of the South Vietnamese government. 17th parallel north The 17th parallel north is a circle of latitude that is 17 degrees north of the
49th parallel north the 1846 Oregon Treaty. This agreement divided the Oregon Country between British North America and the United States by extending the 49th parallel boundary to the west coast, ending in the Strait of Georgia; it then circumvents Vancouver Island through Boundary Pass, Haro Strait, and the Strait of Juan de Fuca. This had the side effect of isolating Point Roberts, Washington. Although parts of Vancouver Island and parts of Eastern Canada are south of the 49th parallel, and parts of the United States (Alaska, Northwest Angle) are north of it, the term "49th parallel" is sometimes used metonymically to refer