People are evacuated from an emergency, like a fire or flood. The “evacuation” was a forced removal. The few Japanese Americans who didn’t comply faced criminal charges. “Assembly centers” were temporary detention centers, with fences and armed guards. “Internment” or “relocation” camps were actually prison camps where the Japanese and Japanese Americans were imprisoned for most of World War II. It was a separate system from the US criminal justice system. “Evacuees” were prisoners.
