The United States entered World War II after a surprise attack by the Japanese on December 7, 1941. U.S. officials feared that Japanese Americans would betray their country and help Japan. Nearly 120,000 Japanese Americans were taken from their homes and moved into relocation centers, which some viewed as concentration camps. The internees, backed by many other Americans, believed that their fundamental rights as U.S. citizens had been denied. Years later the government apologized for its unjust actions.