The way the U.S. Federal bureaucracy is in bed with the WHO, NATO, and the UN, it is likely a UN "peacekeeping" force would be deployed against the citizens of these United States. It would (UN forces) be deployed for "the good of the nation" and half the people in this country would be OK with it.
The UN/foreign nationals have never been required for the US mil and le to act against US citizens upon being ordered to.
