The tribal societies change in the following: They began to involve a centralised administrative system. Someone social division within a tribal society also took place. Tribal kings began to grant land to Brahmanas, poets and scholars. Tribal kings also wished to be reconised as other famous king of the subcontinent, such as. Tribal kingdoms began to annex smaller neighbouring kingdoms. For example, Ahom annexed kingdoms of Chhutiyas and Koch-Hajo. In order to build a large state, Ahom used firearms. Literary development such as translation of Sanskrit work into local language and writing history in Ahom language were also new developments.