Why India could not defend against foreign invasions in the past centuries, is an open question on the minds of most compatriots. This land had achieved the lofty heights of greatness in learning, philosophy, and sciences, among its peers of the ancient world. But then, somewhere in the swirling mist of time, it lost its way and by the time it became Hindustan, during the Medieval Period, it was shorn of all that plumage of greatness and majesty and rendered feeble and vulnerable to onslaughts. This book is about how and why all this subjugation transpired. The analysis about how and why all this transpired, began with Volume-I. In Volume-II we visited the Islamic Ascension to Deccan. In this Volume-III, we shall witness yet another successive invasion of Hindustan this time by Mughals. The total appraisal relating to how the ancient Bharata Varsha was transmogrified into Hindustan during the Medieval Period and then to India, is accomplished in five volumes. The causes of our incapacity to defend and repel the invaders are intently explored, which then become Lessons for the Future.