So long as the dem-communists remain in power, those troops won't be leaving.
If anything, their ranks will increase in size, and their fortifications will become permanently installed.
I don't expect the "Capitol Wall" to be coming down, either.
It, too, will transmogrify into a permanent installation, just as the impromptu "barbed wire" Berlin Wall changed into a more permanent form... complete with a "no man's land" between the East and the West.