All of the following are examples of forced migration due to government-imposed expulsion, except __________.

The question asks which example was not caused by government-imposed expulsion. British prisoners, enslaved Africans, and Jews under Nazi rule were forcibly transported or displaced by authorities. Irish people moved to America during the Potato Famine mainly to escape famine and hardship, not because the government expelled them. Therefore, the exception is Irish migration during the Potato Famine.

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