If they plan to keep accepting the authority of their home country, historically they could be called "colonists".
Today, we'd call them a diaspora or a community, for example: Hungarian Community in Paris.
Depression, don’t need to explain that one
trauma, don’t need to explain that either.
ptsd, post traumatic stress disorder which leads to trust issues
The higher-order need by Maslow is Self Actualization it is the need to reach one’s highest potential and to attain a sense of fulfillment to the highest level. It is the realization of one’s talent and potentialities. It becomes a source of motivation after lower order needs are satisfied.