Ku Klux Klan
【正确答案】：①The KKK was first organized in 1866 and then reformed in 1867 after the Civil War in the South.
②In 1915, it was reactivated and by 1924 it claimed a membership of four to five million.
③The KKK terrorized and attacked not only blacks, but also progressives, labor union organizers, Communist or socialist party members.
【题目解析】：
参见教材P210。
