Korematsu v. United States was a landmark Supreme Court case concerning the constitutionality of President Franklin D. Roosevelt’s Executive Order 9066, which ordered Japanese Americans to be held in internment camps during World War II. In a 6–3 decision made on December 14, 1944, the Court came down on the side of the government, ruling that the order was constitutional in an opinion written by Associate Justice Hugo Black. The ruling reflected a long-standing precedent that the president and Congress could take extraordinary actions to protect the nation during times of crisis, especially wartime.