CIA had authentic intelligence input that China was planning to capture Tibet in early 1950s and they briefed their President DD Eisenhower too. And the President wrote to PM Jawaharlal Nehru twice in this regard warning him of impending Chinese invasion. US State Department approached him to devise a strategy to stall Tibetan acquisition by Chinese.
Nehru had a different vision of Hindi-Chini Bhai-Bhai hence, didn’t give a damn to those US overtures. He wished to cooperate with China for some international issues quite close to his heart.
America then had no other option except to seek the cooperation of Nepal, airdropped 19 well-trained and armed Khampas to liberate Tibet. However, it was not successful, Chinese captured Tibet and declared Dalai Lama a separatist. The irony is that same Dalai Lama came to Bharat after fleeing captured Tibet seeking succour from the same Nehru quite innocently unaware of the fact that it was his supposed benefactor who happened to be the cause of his agony.
Nehru was warned again by Americans regarding planned Chinese invasion in Kashmir and North-East. President Kennedy offered financial help and technical know-how to develop nuclear weapons as the apprehended Communist capture of the entire country. Nehru again declined the offer and rest is history.
It was then that embittered Americans turned hostile towards Bharat and they started leveraging Pakistan while Pakistan being a rogue and illegitimate country, lapped up the offer only to become a perpetual headache for us.