In 737 , the Tibetans launched an attack against the king of Bru - za ( Gilgit ) , who asked for Chinese help .
In 737 , the Tibetans was ultimately forced to pay homage to Tibet .
In 737 , the Tibetans launched an attack against the king of Bru - za ( Gilgit ) , who asked for Chinese help , but was ultimately forced to pay homage to Tibet .