After some Japanese Americans attempted to challenge the internment policy in the courts, the War Relocation Authority included the following statements in a confidential internal memo on August 12, 1942.
The action taken with respect to Japanese in this country is justifiable on the grounds of military necessity for several reasons.
1. All Japanese look very much alike to a white person -- it is hard for us to distinguish between them. It would be hard to tell a Japanese soldier in disguise from a resident Japanese. The danger of infiltration by Japanese parachutists, soldiers, etc. is, therefore, reduced and the chances of detecting any attempt at infiltration are increased.
2. The Japanese Government has always tried to maintain close ties with and control over Japanese people in this country with the result that many of them have never really been absorbed into American life and culture. Many Japanese-Americans have been educated in Japan. Many, believers in Shintoism, worship the Emperor and regard his orders as superior to any loyalty they may owe the United States. Therefore, the action has reduced the danger of successful invasion by removing an element of the population which had never been assimilated and which might not successfully withstand the strong emotional impulse to change loyalties or give way to their true feelings in the event that Japanese troops should land on our shores.

