On February 19, 1942, shortly after Japan's surprise attack on Pearl Harbor in Hawaii, President Franklin D. Roosevelt signed Executive Order 9066 authorizing the forced removal of over 110,000 Japanese Americans from the West Coast and into internment camps for the duration of the war.
[2] The unanimous Supreme Court decision Ex parte Endo in December 1944 ruled that the U.S. government could not continue to detain a citizen who was "concededly loyal" to the United States.
Examples include exclusion from being hired by jobs in the LA county, and being shut out by the produce industry, which was the lifeblood of many Japanese Americans prior to WWII.
[11] In 2018, Chief Justice Roberts, in writing the majority opinion of the Supreme Court in Trump v. Hawaii, stated in obiter dictum that the 1944 decision Korematsu v. United States that upheld the constitutionality of Executive Order 9066 (authorizing the Japanese American Internment) was wrong, effectively disavowing the decision and indicating that a majority of the court no longer finds Korematsu persuasive.
[12]: 38 Roberts also added: "The forcible relocation of U.S. citizens to concentration camps, solely and explicitly on the basis of race, is objectively unlawful and outside the scope of Presidential authority.