Rome Day 7

Rome kinda fell out of nowhere because they just lost one battle and their entire empire fell down from there. I dont think that will happen to the USA because we dont have as many battles and try to own huge empires in this day and age. But in this hypothetical scenario if the US would get taken over like Ancient Rome did then its always possible. One war can demolish a place with tons of power just like what happened to Rome. The only reasons in my opinion that the US would fall is if some government problem and not like Rome.