The Mã River ( Vietnamese : Sông Mã , Lao : ນ້ຳມ້າ / Nam Ma ) is a river in Asia , originating in northwestern Vietnam . It flows 400km through Vietnam, Laos , and then back through Vietnam, meeting the sea at the Gulf of Tonkin .
3-968: The largest tributaries of the Ma River are the Chu River (also called Nam Sam River in Laos), the Bưởi River, and the Cầu Chày River. All of them join the Ma River in Thanh Hóa Province in North Central Vietnam. The Mã River creates the Mã River Delta (also called the Thanh Hóa Delta), the third largest in Vietnam. The Mã River Delta used to be near Vietnam's southern frontier. It was the center of Cửu Chân,
6-712: The Nam Sam River or Nam Xam River (name in Laos ), is the largest tributary of Mã River . It originates from Houa peak at 2062m near Xam Neua town, Houaphanh Province in eastern Laos and travels east to meander through the Nghệ An and Thanh Hóa provinces of Vietnam. It joins Mã River on the left in Thiệu Hóa . The river is 325 km long (165 km in Laos and 160 km in Vietnam) with
9-603: The southern of the Vietnam's two prefectures under the rule of the Nanyue in the 2nd century BC. 19°47′N 105°56′E / 19.783°N 105.933°E / 19.783; 105.933 This article related to a river in Laos is a stub . You can help Misplaced Pages by expanding it . This article related to a river in Vietnam is a stub . You can help Misplaced Pages by expanding it . Nam Sam River Chu River (name in Vietnam , Vietnamese : Sông Chu ), also known as
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