. "400,000" . . . . "China" . "100,000" . . "at the Dafeichuan" . . "Dafei River" . . . . . . "Dafeichuan" . "Tang dynasty" . "Tang strategic victory" . "50,000" . . . . . . . "Battle of Dafei River" . . . . "Battle of Dafei River" . "Tibetan Empire" . . "major defeat" . .