Well, as per the scenario I have been developing with these past few questions, I was thinking of putting this scenario in the year 2500 CE.
For those of you whom have been living under a rock for the entire time, I will explain.
The Extraplanetary Wars were a series of conflicts that were fought between Earth and her colonies, between 2391 and 2396 in the First Extraplanetary War, sparked by the discovery of non-Earth derived phosphorus, although political factors such as the strengthening of the UN Authority for Planetary Affairs (or UNAPA for short) into Earth's de facto military and law enforcement branch and the failure of the UN Resolution on the Political Status of the Colonies' passing, combined with cultural factors such as the use of pantropy by the colonies in the Outer Solar System and the availability of genetic engineering to allow this, were set in place decades prior. The First conflict lasted until 2396 when the Outer Solar System became independent states, and Mars' uprising was crushed by UNAPA. However, the Outer Solar System in the Interbellum quickly became the new Africa and Middle East combined as the newly formed states were unable to decide on their future, and the only ones that did (the Republic of Europa, the People's Republic of Ganymede and the Titan Federation), became hegemons over the region, while Earth slowly established puppet states in the Belt.
The Second Extraplanetary War began in 2466 after a diplomatic incident between UNAPA and the Titan Federation occurred over interference of both sides in the Ceresian Civil War, combined with several minor skirmishes between Europa, Ganymede and UNAPA's puppet government on 511 Davida. Then the situation quickly escalated and the two regions were forced into a state of war. The war lasted for six years and as the Outer Solar System fought a losing battle against UNAPA, in a final act of defiance and desperation, they redirected asteroid 2000 VN2 on a collision course with Earth, and despite a series of attempts to stop it by UNAPA's Orbital Guard, Space Forces and Espatier Corps, the joint forces of the Titan Federation, the Republic of Europa and the People's Republic of Ganymede were able to successfully redirect the asteroid and on April 15, 2472 at around 17:00 hours UTC, the asteroid slammed into Earth at a speed of ~40 km/s 2 km off the coast of Guam, releasing 5.35 teratonnes of TNT upon collision, resulting in devastation across the Asia-Pacific Region and causing a nuclear winter that killed off 40% of Earth's population at the time. The UN, crippled from the attack, with an economy in shambles and with the surviving governments of the 2000 VN2 attack absorbed into the UN, it was forced to negotiate, and thus release Mars and its moons as its own independent states under a UN-like planet-wide structure, and renounce its authority over the Outer Solar System (long since lost).
Now, the Solar System is recovering, with the colonies rebuilding and Titan, Ganymede and Europa back to outwitting each other and Earth being reduced to the Moon, Venus and Mercury as its last holdouts outside its atmosphere. With this in mind, how will historians from 2500 CE remember these days from a neutral standpoint?
To those of you who think the UN is the sole authority of Earth prior to 2477, I suggest thinking again. The UN in this case refers to a more powerful version of the modern UN...at least prior to 2477 when 1999 FN53 attack occurred, and the UN was forced to absorb Earth's remaining governments (particularly, those in the developed world) in an attempt to restore stability across the globe. So....the reason why by 2500 Earth is under UN control is understandable.