War in Heaven

The War, sometimes known as The Future War or The War in Heaven is a future war which was (or would have been) fought between a group / entity known only as The Enemy and the Time Lords.

The War did happen...and as it was also a temporal war elements of The War filtered backwards through time to before The War occurred.

Future History of '''The War
It is indicated that the Time Lords were not winning The War. There were at least nine clones of Gallifrey. War Looms clogged the atmosphere of at least on of the Gallifreys with biodata soot. (EDA: The Taking of Planet 5)

Preemptive Strikes
The Time Lords attempted to beat The Enemy by taking a preemptive strike at The Enemy's home world, but not via conventional time travel. The Time Lords set a giant Gallifreyan warship containing The Cold and aimed it at what they believed to be The Enemy's home world; Earth. (EDA: Interference)

Involvement in The War
It is not known if the Faction Paradox were involved as active combatants in The War. They did place a colony on the side of a Gallifreyan warship aimed at what was believed to be The Enemy's home planet. Anathema was the colony, the colonists were The Remote. (EDA: Interference)

Technology and Development
Time Lords from a later period in the war did not have humanoid form, only the 'Generals' had totally humanoid forms.

Type 102 TARDISes and War TARDISes were in full use by The War, 102s were used by Time Lord agents whilst War TARDISes were utilized by Time Lords on missions. (EDA: Alien Bodies, The Taking of Planet 5)

Preparations
The Time Lords of the 'present' knew that The War was approaching, Lady President Romana knew as much and began stock piling weapons in The Slaughterhouse a weapons store protected by a time eddy.

Even at this early stage in the pre stages of The War Romana was already War Queen and Mistress of the Nine Gallifreys. (EDA: The Ancestor Cell)

Romana, knowing that new TARDISes would be required for the future war sent Gandar and Cavis two of her most trusted agents to capture the newly formed type 102 TARDIS, known as Compassion from the Eighth Doctor. (EDA: The Shadows of Avalon)