In Korematsu v. United States, the Supreme Court upheld the removal to internment camps of Japanese-Americans.
This ruling upheld the constitutionality of the Executive Order 9066, issued on February 19, 1942, by President Roosevelt, which decreed that all residents of the United States of Japanese origin, even if born on American soil, had to to be locked up in internment camps. In total, 110,000 Japanese were interned.
Lincoln urged those freed by the proclamation to "abstain from all violence, unless in necessary self-defense" and to "labor faithfully for reasonable wages.
I suppose it made the free states and slave states in some way even. When Missouri became a slave state they kept the north end of the Louisiana purchase free stated and banned slavery there.
A. foreshadowing because sensory details are touch,taste,sound,see,smell; and you can't do the majority of those with this passage. Also, there isn't a metaphor in this.