Order 9066 was a World War 2 policy that had long term consequences for the Japanese Americans. The order allowed the Army to "evacuate" anyone that they thought was a threat to National Security.
It affected the Japanese Americans severely. The order forced more than 120,000 Japanese to relocate. They were relocated to 1 of the 10 internment camps around the U.S. (Internment = putting someone into some sort of prison..) They put the Japanese into these camps in fear that they were loyal to Japan.