What exactly is your nation? If its in SA, tough luck as you will not control the UN even with a revolution. Andes? Played by Jason the King. NHC: Sir Lancelot, France: Toasty.
EDIT: I see your pitiful "incursion. even if you burn the UN, it will spring up again. Maybe in Cairo, maybe in Paris, Maybe in Beijing, or maybe in Moscow. You cannot defeat us even if you burn Cuzco. If you burn it, your death will come even more quicker. If you burn Cuzco, I for one will supply the Andes to rebuild it. I will send my forces to attack your incursion in South America. The members of the Iron Fist had the chance to side with the UN. I did, Arabia did, and Madagascar eventually did. What is happening the nations that were in and are in the Iron Fist?
Zululand: Being crushed on all fronts.
Ethiopia: Same as Zulus except for an incursion in the Andes.
Carthage: Completely destroyed.
Rome: Destroyed
India: Same as Zululand
Egypt: Winning a war, getting new technologies, gaining massive land.
Arabia: With allied help, rebuilding from an Iron Fist trick and being sucessful.
Madagascar: In the process of regaining land and peace talks.
As you can see the nations who changed sides are doing well and the others are not. Let this be a lesson to you.