What treaty was violated by Cuba back in 1962? No one, except for a treaty with sane-mind. You are trying to endanger your much more powerful neighbor - you are asking for problems. What treaty was violated by Mexico back in 1822, 1836 or 1846, except for a treaty with sane-mind? If you can't stop immigration, if you can't prevent revolution or find a mutually acceptable solution, if you are trying to suppress a rebellious provinces with a pure military power, while you are military weak, ok, you are asking for problems.