The internment Arrest of Japanese Americans in the United States during World War Hostile_encounter II was the forced relocation Removing and incarceration Arrest in concentration camps in the western interior of the country of between 110,000 and 120,000 people of Japanese ancestry , most of whom lived on the Pacific Coast .

Roosevelt authorized Preventing_or_letting the deportation Removing and incarceration Arrest with Executive Order 9066 , issued Statement on February 19 , 1942 , which allowed Preventing_or_letting regional military commanders to designate Choosing `` military areas '' from which `` any or all persons may be excluded Preventing_or_letting . ''

The Court limited Limiting its decision Deciding to the validity of the exclusion Removing orders Arranging , avoiding Preventing_or_letting the issue of the incarceration Arrest of U.S. citizens without due Causation process .

the commission 's report Reporting , titled Name_conferral `` personal justice denied , '' found Know little evidence of japanese disloyalty at the time and concluded Coming_to_believe that the incarceration Arrest had been the product Manufacturing of racism .