Nukes have been used in anger only twice in history and it wasn't over a declaration of independence. They're really not very useful as an offensive weapon. If

Nukes have been used in anger only twice in history and it wasn't over a declaration of independence. They're really not very useful as an offensive weapon. If (say) Tibet declared independence, there is absolutely no chance that China would nuke it. They would simply send in a whole lot of tanks and people with guns.