The same sort of army Castro raised- a howling mob of young men armed with baseball bats, rocks, and rebar. They went out looking for “the wealthy” and others who were considered a threat to socialism.
The Cuban targets were not armed, for the most part, but in the USA, few armed individuals could handle a crowd of 200 throwing gasoline bombs. You’d get many, but probably not enough.
My 6.5 Creedmoor is good for a thousand yards... if not for the tragic canoeing accident.