The bridge , situated Placing over the Dadu River in Luding County , Garzê Tibetan Autonomous Prefecture , Sichuan , China , was located about 80 kilometers west of the city of Ya'an and was a river crossing Motion_directional vital to the Red Army .

Fleeing Escaping from pursuing Aiming Chinese Nationalist forces Causation , the communists found Know that there were not enough boats to cross Motion_directional the Dadu River ( Sichuan province ) .