Since you ar a good military historian and a thinking man, may I suggest that you read Philip Mason's A MATTER OF HONOUR.
Though written by a Britisher, I think that encompasses the phases of the British Indian Army.
It is a great book.
Thugees are not important since that was a social hassle that was sorted out by the British as also by Indian reformers.
The Indian Sepoy Mutiny or First War of Independence is a different kettle of fish.
Believe me, terrorism is very difficult to erradicated. Especially the Islamic one. Their mindset is wierd and outlandish and beyond logic.
A group that is brainwashed to believe 72 virgins up there if they die for Islam is beyond teaching the verities of the present life. Imagine, you screw the present life and hope for a beautiful beyond which you don't know really exist. If you can;t get one virgin in your present life, what the hell of dreaming about 72! Wierd.
The mindset baffles me.