Many historians believe that it was in Assam where gunpowder was invented.There has been trade between China and Assam in 1st Millennium AD and Assam had certain degree of civilization.
British traveler and historian J.B. Traveneer states: "It is believed that it is the same people who in ancient times first discovered gun and gunpowder, which passed from Assam to Pegu and Pegu to China.