Starting in 2017, every year on July 4th, the alt right descends on Gettysburg to defend against Antifa, or BLM, or the secret unicorns, or whoever. They claim that whoever is going to desecrate the Confederate Cemetery At Gettysburg... If you know your Civil War history, you know there is no Confederate Cemetery At Gettysburg. They usually threaten Blacks, and anyone who looks like they might be educated. Back in 2017, one of them actually shot himself in the leg.
What has not happened was Antifa, BLM, or anyone else showing up. There were no plans to show up. It just did not happen.