Presidential order 9066 was signed by President Franklin D. Roosevelt during on 1942, during the time of the Second World War. This order authorized the military to create zones within the country that would serve as concentration camps for the eventual incarceration of people that were descendants of the Japanese, Germans, or Italians. This, according to the government, was justified due to potential acts of espionage that enemy nations could go through the mentioned citizens who lived in the United States.
Although it can be considered as an act that infringed these citizens' rights to freedom, it is justifiable due to the circumstances that the country was going through at that moment.