By gettings its independence recognized, a region becomes a subject of international law though. It can become part of the UN and officially enter alliances and

By gettings its independence recognized, a region becomes a subject of international law though. It can become part of the UN and officially enter alliances and such with other states. The civil would become an international matter and can't be declared a purely domestic affair anymore. It becomes vastly more easy to bring money into the region and get an independent economy going. It would have its own exterior politics and officially opens it up to the influence of other countries. The state the region seceded from might not be friendly with some of them.