The history of ancient India is full of instances which demonstrate that military practices were well-regulated. The Varna system of the ancient Hindus implied the fourfold division of society into Brahmans, Kshatriyas, Vaisyas and Sudras. The Brahmans formed the group of philosophers and teachers, the Kshatriyas the group of rulers and warriors, the Vaisyas the group of agriculturists and traders, and the Sudras the group of men engaged in different menial services. The idea gained ground that to follow one’s own Dharma and to sacrifice one’s own life, if need be, in the following of that Dharma, was the highest duty expected of every citizen, to whatever caste he belonged.