>There is no provision for secession in the US Constitution.
Yes, but Article I of the UN Charter expressly provides for the right of Self-Determination.
>Practically, well, the one notable attempt didn't work out, so not that, either.
Yes, that resulted in more American deaths than all other US wars combined. However, notably that was also before the UN. Moreover, not only does the UN provide for a right of Self-Determination it also restricts the right for any nation to use force (i.e. armed conflict, Article 2(4)). If a group of people with a well defined territory peacefully secedes, and armed conflict and use of force is implemented to prevent the secession that would violate the UN Charter, use of force and laws of armed conflict.
Obviously one of the best examples case studies of applying international laws and norms to the real world is Palestine, which is recognized by the UN and 193 member nations as an independent State, but Israel does not. Obviously its not as easy as Palestine simply secedes through a democratic vote, as there are all kinds of claims from both sides regarding land disputes, use of force and laws of armed conflict. Still international recognition of Palestine as an independent State is a giant mile stone in the process.
Yes, but Article I of the UN Charter expressly provides for the right of Self-Determination.
>Practically, well, the one notable attempt didn't work out, so not that, either.
Yes, that resulted in more American deaths than all other US wars combined. However, notably that was also before the UN. Moreover, not only does the UN provide for a right of Self-Determination it also restricts the right for any nation to use force (i.e. armed conflict, Article 2(4)). If a group of people with a well defined territory peacefully secedes, and armed conflict and use of force is implemented to prevent the secession that would violate the UN Charter, use of force and laws of armed conflict.
Obviously one of the best examples case studies of applying international laws and norms to the real world is Palestine, which is recognized by the UN and 193 member nations as an independent State, but Israel does not. Obviously its not as easy as Palestine simply secedes through a democratic vote, as there are all kinds of claims from both sides regarding land disputes, use of force and laws of armed conflict. Still international recognition of Palestine as an independent State is a giant mile stone in the process.