My guess would be a move on Bhutan. Who is going to start WW III over Bhutan?
There isn't a formal mutual defense treaty between the US and India. China is already the 3rd largest country on Earth. It doesn't need to attack in every direction the way Germany or Japan did. Its style is what Indians have called salami-slicing - to cut off a sliver at a time. In the larger scheme of things, Bhutan and Nepal are salami slices. Once digested, it will move on to other objectives.