like other branches of sanskrit literature, treatises on martial arts become more systematic in the course of the 1st millennium ce. the grappling art of vajra-mushti is mentioned in sources of the early centuries ce. military accounts of the gupta empire (c. 240-480) and the later "agni purana" identify over 130 different weapons, divided into thrown and unthrown classes and further into sub-classes. the "kama sutra" written by vātsyāyana suggested that women should regularly "practice with sword, single-stick, quarterstaff, and bow and arrow."