Reconstruction Era: The period following the American Civil War, during which the federal government sought to reintegrate the Confederate states into the Union and determine the status of freed slaves.
Impeachment:The process by which a legislative body (usually a parliament or congress) brings charges against a civil officer of government for crimes alleged to have been committed while in office.
Radical Republicans: A faction of the Republican Party during the American Civil War and Reconstruction era, who advocated for the aggressive prosecution of the war, the abolition of slavery, and the extension of civil and political rights to freed slaves.