What could cause you to lose your citizenship of a certain country would be if you decided to betray your country for some reason in some way. This could be done in multiple fashions, one being if you're in the army and you give out a top military secret. This cold make you lose citizenship.
The us and japan became allies and trading partners
<span>The largest group of non-willing immigrants to America were taken from "Africa," since it was Africans who worked in the fields in the American South (which was the area that contained the most slaves). </span>
George Fitzhugh. He was a racist and was pro-slavery, not an abolitionist in any shape or form.