1954 in the Vietnam War states at the 17th parallel of latitude. Ngô Đình Diệm became Prime Minister of South Vietnam and Ho Chi Minh became President of North Vietnam. Diệm overcame an early challenge to his rule from army leaders and the Hòa Hảo and Cao Đài religious sects. The United States pledged its support to the Diệm government and began to replace France as the principal foreign power involved in South Vietnam. China and the Soviet Union began to provide economic assistance to North Vietnam. 12 January Emperor and Chief of State Bảo Đại appointed Bửu Lộc as Prime Minister of Vietnam. 29
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