en.wikipedia.org/wiki/Bonus_Army
en.wikipedia.org/wiki/Long,_hot…
en.wikipedia.org/wiki/Tulsa_rac…
sfgate.com/news/article/F…
en.wikipedia.org/wiki/1919_Unit…
Right now, for all the online vitriol, the worst we've seen in terms of actual violence were Charlottesville and the Alexandria shooter.
(end)