Most Hindus are familiar with the opening of the Bhagavad Gita, where the battlefield is called the field of ‘dharma’. But do any of us ever ask why? Modern interpretations of the Gita in India mostly follow the early theosophists' position of allegorizing ‘Kurukṣetra’ as a war between good and evil within every person in which finally the evil forces, senses, and urges are destroyed. Undoubtedly this is true.
This post draws heavily on Israel Selvanayagam's article "Aśoka and Arjuna as Counterfigures Standing on the Field of Dharma published in History of Religions, Vol. 32, No. 1 (Aug., 1992), pp. 59-75