The renewed assertion of American dominance in the Western Hemisphere, reminiscent of the Monroe Doctrine, is reshaping global power dynamics, particularly in the Indo-Pacific. By consolidating its influence close to home, the United States frees up strategic resources but is increasingly selective in its overseas commitments, especially regarding India and China. China, recognizing American prioritization, is unlikely to act recklessly but may apply persistent pressure on India through border tensions and strategic maneuvering, rather than seeking outright conflict. India, meanwhile, balances deepening defense ties with the United States and a longstanding partnership with Russia, complicating Beijing's calculations and preserving its own strategic autonomy. The military balance between India and China hinges less on sheer numbers and more on operational geography, logistics, and regional influence, with the real risk for India being strategic marginalisation rather than invasion. The article argues that India must shift from a reactive border defense posture to a broader, theatre-wide deterrence strategy to maintain its strategic relevance.