This question already has an answer here:
Throughout history, states (countries) have broken away from other states to become independent, usually against the will of the parent state. But has there ever been a case of a parent state forcibly expelling part of its own territory against the will of the people who live there?
To be clear, I'm not asking about territory given away to resolve territorial disputes, territory sold, or states created from crumbling empires. I'm specifically looking for examples of a state basically saying to part of its territory, "We don't like you. You're on your own."
I suspect the answer is no, because most states would probably expel the people and keep the territory...