A secret organization that functioned as the grassroots wing of Radical Republicanism in the South was called the

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The Union League was a secret organization that aimed to promote Radical Republicanism in the South by organizing and mobilizing African Americans to vote and participate in politics. The organization also provided resources and support for newly freed slaves, including education and job training programs. The Union League played a significant role in shaping the political landscape of the post-Civil War South.

A Secret Organization That Functioned as the Grassroots Wing of Radical