After the attacks on Pearl Harbour, many canadians suspected japanese people as possible spys or suspicious partners with the Japanese army.  Law were passed against People of Japanese descent, they weren't allowed to vote, work in coal mines. Eventually, Internment camps were set up where japanese people were forced to do harsh labour.

 The American Military oath of enlistment states “I, _____, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God." Once this oath is sworn it must be kept for the whole term of enlistment by everyone who joins the military.