Answer:
They greatly mounted racial tension, and the determination of the white population to keep the African American population in 'its place' socially, politically, and economically
and They Terrorized African Americans greatly because they were unhappy with the government
Step-by-step explanation:
the Reconstruction era was closely linked to the Ku Klux Klan,The White League, The "Red Shirts" and The Redeemers.
The Ku Klux Klan, the Red Shirts, and the White League were solely responsible for restoring white supremacy and restricting the rights of the ex-slaves. This group during the era , they worked closely together to restore white supremacy in the South through the use of threats and violence against free black people and white Republicans.
They were called white terrorist organizations as they belief that white people are superior to others because of their race.The Ku Klux Klan was founded in 1865 while the White League in 1874.