The concept of dharmayudha in intrinsic to Sanatan Dharma . It emanates from the lessons of the epics the Mahabharatta and the Ramayana. This means that one has to always struggle in life to make the best of the circumstances that one finds oneself in. This is because Brahman-Nature created by Sri Krishna as the Creator comprises of sattvic, rajasic and tamasic guna gods in our consciousness. To be sattvic, one must stand up and be truthful and honest in all one's dealings. When one does this one creates enemies from the rajasic and tamasic vested interests in humanity. So there is a struggle to retain one's sattvic nature through appropriate responses to the persecution that is mounted upon one from the tamasic elements of society.

That struggle is known as dharmayudha.