Hinduism
Despite the promotion of ahimsa (non-violence) within Santana Dharma, there is also the concept of righteous (dharma), where violence is used as a last resort after all other means have failed. Examples of this are found in the Mahabharata. Upon completion of their exile, the Pandavas were refused the return of their portion of the kingdom by their cousin Duruyodhana; and following which all means of peace talks by Krishna, Vidura and Sanjaya failed. During the great war which commenced, even Arjuna was brought down with doubts, e.g., attachment, sorrow, fear. This is where Krishna instructs Arjuna how to carry out his duty as a righteous warrior and fight.
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