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With the advent of nuclear weapons escalation between India and Pakistan is less likely. Kargilcrisis (1999) is the testament that nuclear deterrence in South Asia got credibility. The most dominating factor in this entire phenomenon is the balance of power in South Asia. Balance of power between or among states is hard to achieve and equally challenging is to maintain it.If balance of power between states gets upset then they are more likely to engage into serious conflict. Balance of Power in South Asian region continued until Indo-US civil nuclear deal in 2005.Indo-US nuclear deal seriously damaged existing balance of power which would restart tensions between nuclear armed rivals