Military history of Australia during the Vietnam War sought to reassert control over French Indochina, which had been occupied by Japan. In 1950, as the communist-backed Việt Minh, led by Ho Chi Minh, began to gain the ascendency in the First Indochina War, the Vietnamese nation had two parallel administrations; the Democratic Republic of Vietnam (DRV) (recognised by the Soviet Union and the People's Republic of China) and the State of Vietnam (SoV), an associated state in the French Union (recognised by the non-communist world). In 1954, after the defeat of the French at the Battle of Dien Bien Phu, the Geneva Accords of 1954 split the country
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