US supports India over Arunachal Pradesh border dispute with China

For nearly six decades the US has recognized Arunachal Pradesh as Indian territory. We strongly oppose any unilateral attempts to advance territorial claims by incursions, by military or civilian incursions across the established Line of Actual Control(LAC). And the disputed boundaries, all we can say is that we encourage India and China to use their existing bilateral channels to discuss those and not resort to military force: US Senior State Dept Official