What were the effects of the 15th amendment?

The Fifteenth Amendment guarantees the right to vote regardless of race. It gave African American men a voice in government and is the third of the three great "Reconstruction Amendments" which followed the American Civil War between 1865 and 1870.

The Fourteenth Amendment is the civil rights, immigration, and personal liberties amendment. The Thirteenth Amendment forever outlaws slavery in the United States. All three amendments were largely ignored for a century, principally in most of the former slave holding states which enacted what were called "Jim Crow" laws ("Separate But Equal" statutes). It took a vigorous, determined and courageous action by the Civil Rights Movement to bring about the National Voting Rights Act of 1965 and finally fully implement the Fifteenth Amendment.