The Frontier states of the Gupta Empire or the Border Kings refers to the various kingdoms and tribal republics that accepted suzerainty of the Gupta Empire. [1]
The frontier states obeyed the orders of the Gupta Empire along with paying tributes and attending the imperial darbars (court) to pay homage to the emperor. [3]
According to historian Upinder Singh, the relationship between the frontier states the Gupta Empire had "certain elements of a feudatory relationship". [4]
After Samudragupta died, Chandragupta II ascended the throne. He annexed most of the frontier states. [5]
The Gupta inscriptions also mention a king of Simhala as one of the kings being submissive to Samudragupta. But this is likely an exaggeration because Chinese sources state that the king of Simhala only sent presents for his permission to build a Buddhist monastery and not as an act of submission. [6]