Wrong. There are few soldiers of india in bhutan and most of them are trainers to bhutanese army. As i said, Everytime chinese came earlier, they were sent back and even this time bhutan informed india. This time chinese came with their hardware to construct a road so india transferred their soldiers there.
Under congress rule, chinese did encroachment but under modi rule, they were sent back. U.S is no where here in game and they wont help india. Upto max, they may tell us chinese positions or logistics supply etc..nothing more ..