What does my theories about International reactions on Brexit and the Irish border have to do with the legality of China using troops to forcefully break another treaty? Would China’s action become legal depending on what I answer?
I understand that, but it has nothing do with whether or not China be using force to break a legal treaty or not. Unless what you really want is to divert the discussion away from whether or not China would be breaking a treaty to cases of other nations breaking treaties.
How many? I only think of one the Paris agreement that the US has withdrawn from. But that is not a legally binding treaty according to the US officials.
"United States officials to regard the Paris Agreement as an executive agreement rather than a legally binding treaty. This removed the requirement for the United States Congress to ratify the agreement.[13] In April 2016, the United States became a signatory to the Paris Agreement, and accepted it by executive order in September 2016"