What did Roosevelts executive order 9066 do?

Executive Order 9066, signed by President Franklin D. Roosevelt on February 19, 1942, authorized the forced relocation and internment of Japanese Americans during World War II. It allowed military commanders to designate "military areas" from which individuals could be excluded, leading to the internment of around 120,000 Japanese Americans, most of whom were U.S. citizens. This action was justified by the government as a national security measure, but it has since been widely criticized as a violation of civil liberties.