United Nations Global Defense Initiative

A United Nations army that any country (in the UN) could join once it is founded by the civ that made the UN, it basically acts like a huge civilization that goes to war together, shares tech, and above all has special units (Mammoth tank, Mammoth Mk II (national unit only 3 build for each nation), Commando (same as Mammoth Mk II) Zone Raiders, Orca Gunship, MCV (which can build a pack able base and build new GDI units when it is deployed)) As well as access to GDI's supper weapon The Ion Cannon (After it is built and the Ion Cannon Control is built in a city) The Ion Cannon Control building is a national wonder that can only be built by a GDI nation that gives them the ability to use the ion cannon once every three turns or so, The GDI is different from regular UN Troops as you can be a part of the UN but not part of GDI, and you can drop out of GDI but stay in the UN, (GDI Units uses lots of upkeep so some nations would not want to be a part of it) and the GDI can help out UN but mostly act independently from it and its main goal is counter Terrorism, as well as any city captured by the a GDI Nation would go to the nation that captured it, It could sort of act like a secondary religion (not counteracting a current religion) if you could find other factions to be founded *Cough* Brotherhood of Nod *Cough*
any way i have ranted on long enough hope you like the idea.
I thought of another thing every civilization should have a "Rebel" Counterpart (US has The Confederacy, The Romans have the Papal states, England has Ireland, Russia has the Bolsheviks, Etc.) and each "rebel" has its own leader, its own cites and possibly its own special units.
*This has multiple effects on the game world and the UN
*one of which is a new feature that allows civs to recognize other civs, if a civ does not have a certain amount of recognition it cant join the UN and it cant have diplomacy with the countries that don't recognize it (this could also allow for micro-nations)
* eventually if a civ pisses off its citizens in a certain area of its country it will bound together and declare Independence, this civ is known as a "Rebel Civ"
* if the rebel civ is formed before the UN then other civs have to chose which country to acknowledge as the true country, the original or the rebel, which just shows who trades with who and who likes who better
* If the rebel civ is formed after the UN then the same thing happens above, but the UN can decide who to acknowledge and help that country by sending troops (either GDI or other UN troops
*If a rebellion is quelled then if a country changed its acknowledgement to the rebel then they would have to manually change it back to the original if they wanted to
*if the rebel civ wins the war and destroys its original you must change acknowledgement manually to them if did not acknowledge them before
*If the war ends in a draw and the original decides to give up on trying to take back the rebel and lets it go on and run on its own then the rebel civ becomes its own civ and other civs can acknowledge both civs the original and the rebel
*changing acknowledgement always pisses off the other nation no matter what, also you can still talk with civs you don't acknowledge but you cant conduct diplomacy and you dont see their boarders
* If you dont acknowldge that a nation exists then you cant see their boarders, and then you can go in and colonize (before the UN is built of course because that is technically a deceleration of war and a UN country can always defend its ally) but you can move your units through their "territory" and can settle in their "territory" allowing things more like what happened in during the age of colonization just taking land that wasn't theirs. (also with this you could have a civic or two that makes sure that your citizens don't get pissed off of taking an unrecognized civs territory by colonization.