Question

Southern republicans worked to prevent injustice but there was little they could do to:

Answer 1

Southern republicans worked to prevent injustice but there was little they could do to: Prevent acts of violence against former slaves
After Abraham Lincoln freed the slave, the American people still need a transition period to make them used to the new societal order. During this transitional period, many people still commit violence against former slaves and feel justified to do so

Answer 2

Prevent violence against African Americans