The League as the ally and successor of the Freedmen's Bureau was one of the causes of the Ku Klux movement, because it helped to create the conditions which made such a movement inevitable.

As early as 1870 the radical leaders missed the support formerly given by the League, and an urgent appeal was sent out all over the South from headquarters in New York advocating its reestablishment to assist in carrying the elections of 1870.
The League had served its purpose.

It had enabled a few outsiders to control the Negro by separating the races politically and it had compelled the Negroes to vote as radicals for several years, when without its influence they would either not have voted at all or would have voted as Democrats along with their former masters.

The order was necessary to the existence of the radical party in the Black Belt.

No ordinary political organization could have welded the blacks into a solid party.