Japanese Internment in WW II in the United States

Causes: Pearl Harbor and the fear of spies

Effects: only 10 convictions of spying, poor living conditions, segregation centers, and  migration back to Japan after the war

Millions of innocent Japanese citizens were forced to endure terrible living conditions in segregation centers even though only 10 of those who were imprisoned were convicted of coalition with Japan.  All of these horrible things were forced upon innocent people out of fear of Japanese spies as a result of the Pearl Harbor attack.

Cite: http://www.historyonthenet.com/WW2/japan_internment_camps.htm