Increase in military power and bases around the world.
More land and supplies
Help civilize the rest of the world
The Supreme Court case Korematsu vs. United States determined that the internment of Japanese-American citizens during World War II was indeed constitutional (legal). The judges voted 6-3 in favor of the American government.
In this case, the majority opinion essentially argued that protecting American society against espionage( aka spying by the Japanese) outweighed the rights of Japanese-American citizens. Ultimately, it came down to the fact that the nations security was at risk and this was more important than the individual liberties of Japanese-American citizens.
Ghettos are often know as being more impoverished/poor than other areas of the city. Ghetto is also more than likely toward darker races/black. This term was also used towards African Americans during that time.