please answer

[Nazi Wales]

My region, The Region of Dictators, had been raided a week ago from the founder of the Crimson Dawn and had kicked me and ten others of my and banned us then destroyed the whole region. Could anything be done about it?

[Frisivisia]

No, that's just raiding.

[Nazi Wales]

so i could just go raid anyone?

[Sedgistan]

http://www.nationstates.net/page=faq#etiquette

Can I invade other people's regions?

Yes. The practice of invading regions, where a group of nations all move to a region with the aim of seizing the WA Delegate position, is part of the game. Certain groups within NationStates are particularly adroit at this, and can attack very quickly. Other groups exist to defend regions from invasion, and liberate those that are captured.

Once I've taken over a region, can I eject everyone else?

You can try. Invader Delegates tend to have very little Regional Influence, which makes ejecting long-time residents difficult. But Delegates can be as kind, generous, evil, or despotic as they wish. It's up to regional residents to elect good Delegates.

If you want to know more about how it works, see this thread.