The DC riot following the MLK assassination in 1968 is the one I remember from the ‘60s.
My late husband had to go to DC on business during that time. NASA officials warned him what areas to avoid. He said it was terrible up there.
I lived not too far from the MD/DC line back then. I remember stories that the Prince George’s County Police had riflemen positioned on their side of the line and had gotten word out that any rioters who crossed it would be shot. None did, supposedly.