Elaine, Arkansas, lays on the site of a Black sharecropper's community, wiped out in 1919, by the US Army, and thousands of local White vigilantes. Estimates of the dead range from 150 to 700. (I'm surprised nobody's ever made a documentary about this massacre!).
They destroyed a whole community in Albany NY to build the Capital Plaza. It's now buried near Exit 23 of the New York State Thruway.