evidence: Guyana is bounded to the north by the Atlantic Ocean, to the east by Suriname (along the Courantyne River), to the south and southwest by Brazil, and to the west by Venezuela. As a result of colonial control, Guyana is embroiled in territory disputes with Suriname and Venezuela. The New River Triangle, a 6,000 square mile (15,600 square km) region in southern Guyana between two tributaries of the Courantyne River, is still claimed by Suriname despite a long-standing maritime border dispute between the two countries being resolved by an international tribunal in 2007. The currently acknowledged border between Suriname and Guyana along the Courantyne is also in dispute, Guyana asserts that the thalweg, or deepest channel of the river, is the line, while Suriname claims control over the entire river and regards Suriname's west bank as the border. The British administration claimed sovereignty of the Essequibo River valley in 1895, which is when the conflict between Guyana and Venezuela first arose. Venezuela was given a portion of the region in a settlement from 1899, but in 1962 it claimed all of the land west of the Essequibo.