In Whose Reign Did the Sultanate?

Complete answer: The Sultan of Delhi, Muhammad Bin Tughlaq ruled from 1325-1351. It is during his rule that the Delhi Sultanate reached its farthest extent. It marched into a large part of the Indian subcontinent.

How many dynasty are there in Delhi Sultanate?

The Delhi Sultanate we are talking about spanned five dynasties, 32 rulers and 320 years. It lasted from 1206 to 1526. Today we give you the names of all the rulers of the Sultanate — one of whom was India's first woman ruler, while the last was vanquished by Babur, the founder of the Mughal dynasty.

What is mean by the internal and external frontiers of the Sultanate?

The 'internal' frontier means the hinterland of the garrison town. The 'external' frontier means the area beyond the hinterland of the garrison towns.