I
River, south-central U.S. It rises in the high plains of eastern New Mexico and flows southeast across Texas and Louisiana to a point northwest of Baton Rouge, where it enters the Atchafalaya River .
It is 1,290 mi (2,080 km) long and forms a part of Texas's borders with Oklahoma and Arkansas. In Texas it was the site of the Red River Indian War (1874).
II
Chinese Yuan Chiang Vietnamese Song Hong
River, Southeast Asia.
It rises in central Yunnan province, southern China, and flows southeast across northern Vietnam, past Hanoi , into the Gulf of Tonkin . The principal river of northern Vietnam, it is about 500 mi (805 km) long and has a wide, fertile delta east of Hanoi.