When the workers, slave rebels, and capitalists came together to smash semi-feudalism in the south. They had to ban the singing of "John Brown's Body" for a Reason. Several of the Generals in the Union Army were members of the International Workingmen's Association. Karl Marx militantly supported the North as a Journalist, and even wrote letters to Lincoln on how to win the civil war. Yes, the Civil War was a revolutionary struggle to smash slavery. Let us draw upon a forgotten history of militancy incarnated as far back as Abolitionism and Slave Rebellions.