Here’s a lively panel discussion from 2002 regarding the mandate to place Civil War battlefields into the context of how slavery brought on the war as part of interpretation at battlefields. I have to say I disagree vociferously with the two panelists who spoke against it. I think what has happened since has vindicated the change.
The video’s description reads, “Historians talked about the merits of a federal law requiring Civil War battlefields to incorporate exhibits and programs on the role of slavery in U.S. history. Following their remarks they answered questions from the audience.”