Question

what is meant by the "internal" and "external" frontiers of the sultante

Answer 1

Internal - the first set of campaigns along the"internal frontier" of the sultanate aimed at consolidating the hinterland of the garrison towns. agriculture was encouraged , new fortresses and towns were established to protect trade routes and to promote regional trade.

Answer 2

Internal frontier of the sultanate consisted of the hinterland of the garrison towns.The external frontier refer to the unconquered territories especially in the southern part of subcontinent.