War in Heaven

The War was a temporal conflict between the Great Houses and their enemy. Several other parties became involved in a shifting configuration of alliances, notably including Faction Paradox, the Remote, the Celestis, and posthumanity. Because the Protocols of Linearity were worn down, it was difficult or impossible to determine a "final" outcome.

The War did not have enough activity in one specific region or era to be given a more specific title than "the War", (PROSE: The Book of the War) but it was known as the War in Heaven by some of the lesser species caught in the conflict. (PROSE: Alien Bodies, This Town Will Never Let Us Go, Of the City of the Saved..., Warlords of Utopia, Warring States, Newtons Sleep, The Brakespeare Voyage, AUDIO: The Eleven Day Empire, COMIC: Political Animals) Others knew the War as the Kurukshetra war. (PROSE: Dharmayuddha)

Before the War
The Homeworld existed in cultural stasis for millions of years before irregularities in the breeding-engines caused four "mutations", including the Imperator, Grandfather Paradox, and a renegade who would later become the War King. These mutations brought about the first changes on the Homeworld since its start. (PROSE: The Book of the War) The Imperator and Greyjan the Sane, among many others, foresaw a conflict in the Houses' future. (PROSE: The Return of the King, The Ancestor Cell)

Greyjan the Sane also foresaw the War and made plans for the Nine Gallifreys to be created through crypto-forming as a precaution. (PROSE: The Ancestor Cell)

The time-active nature of the enemy meant that the Matrix couldn't predict the War. The initial enemy attack on Gallifrey caught the Time Lords by surprise. Chunks of history were blocked off by the enemy to prevent War-era Gallifrey from contacting pre-War era Gallifrey to prepare them for the War. (PROSE: Alien Bodies)

However, as the War progressed, the walls between the pre-War era and the War era thinned. Some pre-War era renegades had encounters with the War, including the Eighth Doctor (PROSE: Alien Bodies, The Taking of Planet 5) and the War King. (PROSE: The Book of the War) A group of Remote drifted into the pre-War era riding a War-time weapon. (PROSE: Interference - Book Two, The Book of the War) Thessalia encountered War era members of Faction Paradox on Zo la Domini. (PROSE: The Book of the War)

The War King returned to the Homeworld with knowledge of the enemy and he was appointed as Lord President of the Great Houses. (PROSE: The Book of the War)

Greyjan the Sane's plan for the Nine Gallifreys was implemented when it became clear that War was inevitable. (PROSE: The Shadows of Avalon, The Ancestor Cell, The Book of the War)

Outbreak of the War
On Dronid, tensions between agents of the enemy and the Great Houses gradually escalated until a member of the Great Houses went there to try to find an agreement with an enemy contact. This member of the Great Houses was killed, and the first battle of the War began. (PROSE: Alien Bodies, The Book of the War)

Immediately, the enemy and the Great Houses attacked each other at many points of space-time. The first conflicts were the Thousand-Year Battles, fought on Utterlost, Kaiwar and Mohandassa. Then the enemy attempted a direct attack against the Homeworld itself, which destroyed many Homeworld technologies, (PROSE: The Book of the War) including the Sash of Rassilon, the De-mat Gun, and the Hand of Omega. (PROSE: Alien Bodies)

In a vision the Eighth Doctor had of the beginning of the War, Gallifrey was devastated by the Enemy's first attack. The Time Lords retaliated against this attack by going back in time and razing the Enemy battle-worlds before the attack on Gallifrey. The Enemy erased this counterattack from history by detonating a star-killer in the systems where the Gallifreyans had obtained the materials used to construct their fleet at a point before the materials had been mined. (PROSE: The Ancestor Cell)

And so the War quickly became a series of strikes and counterstrikes. A four-dimensional conflict which was, as Qixotl described it, a "temporal stalemate". (PROSE: Alien Bodies)

A temporal stalemate
The Eighth Doctor found himself participating in an auction for his own corpse against Wartime factions who wished to weaponise it. (PROSE: Alien Bodies)

War looms clogged the atmosphere of at least one of the Gallifreys with a biodata soot. These looms produced soldiers all day and night to provide the Time Lords with fodder for the War. (PROSE: The Taking of Planet 5) The incident where a Gallifrey was first lost was called the battle of Mutter's Cluster. (PROSE: The Taking of Planet 5)

The Time Lords attempted to beat the enemy with a preemptive strike at their homeworld, which they believed to be Earth. Instead of using conventional time travel, they built a giant warship containing the Cold and sent it to Earth. (PROSE: Interference)

On the planet Dust, Faction Paradox tried to influence I.M. Foreman's regeneration with a biodata-altering virus, but their plan took an unexpected turn when the Third Doctor and Sarah Jane Smith came to the planet. Instead of infecting I.M. Foreman, the virus was attracted to the Doctor when he was shot by a local. Shortly afterwards, the Doctor regenerated. (PROSE: Interference)

With history changed by the Third Doctor regenerating on Dust instead of in the UNIT HQ laboratory, the timelines became much more uncertain and malleable. Some regions of space-time degenerated into a series of realities which formed the Obverse. (PROSE: The Ancestor Cell) A cataclysmic war began between the inhabitants of the main universe and the inhabitants of the newly formed Obverse. (PROSE: The Blue Angel)

Rise of House Lolita
Amid the chaos, the Homeworld found time to attack the Osirian Court. Threatening to flood a crucial point in history with Mal'akh, Sutekh effectively blackmailed the Great Houses into a peace treaty with his people. (AUDIO: Coming to Dust)

The end of the War
Entarodora believed that the War would be ended by either the entire War's retroactive annulment, or a victory for one side so complete that it would become history. (PROSE: The Book of the War)

Some members of the Great Houses believed that the War would end after the Seven Prophesied Heads of Severance spoke. (PROSE: The Book of the War) In a deleted scene of Mujun: The Ghost Kingdom, Baron Amatsumara said, "When the Seventh Head speaks, the War will end, and the true War will begin." (PROSE: Head of State)

According to The Book of the Truce, it was believed that the War could be ended by placing all its participants in oxbow realities. Some optimistic thinkers thought that the War would resolve itself if only a few key figures were trapped in oxbow realities. (PROSE: Weapons Grade Snake Oil)

Retroactive annulment
Instabilities in time from the War - such as the Third Doctor's regeneration on Dust and the Obverse war - significantly affected Time Lords of the pre-War era, alerting them to the nature of the War.

On what appeared to be the original Gallifrey, Romana was made the War Queen and mistress of the Nine Gallifreys. She began stockpiling weapons in the Slaughterhouse, a secret arsenal protected by a time eddy. (PROSE: The Ancestor Cell) She planned to use Bull-TARDISes to mate with Compassion to create a new Type 103 TARDIS.

Romana dispatched two of her most trusted agents, Gandar and Cavis, to capture Compassion while she transformed into a Type 102 TARDIS in Avalon. While the agents managed to almost start a nuclear war between humans and avalonians, they did not capture Compassion, who escaped with the Eighth Doctor and Fitz Kreiner. (PROSE: The Shadows of Avalon)

After the Doctor installed a randomiser inside her, Compassion managed to elude the Time Lords for a considerable time, (PROSE: The Fall of Yquatine, Coldheart, The Space Age) but she was eventually found by an operative in the 19th century. (PROSE: The Banquo Legacy)

By the time Compassion was brought to Gallifrey, the planet was the epicentre between two conflicting histories; the Edifice loomed in Gallifrey's sky containing a timeline where the War never existed while an army of Faction Paradox members attempted to invade Gallifrey. By resurrecting Greyjan the Sane, Faction Paradox took control of the planet and began merging it with the Eleven-Day Empire (which had not yet been destroyed). The Eighth Doctor confronted Grandfather Paradox in the Edifice and restored the original timeline, at the cost of destroying Gallifrey. (PROSE: The Ancestor Cell) By one account, this ended the War. (PROSE: The Gallifrey Chronicles)

Survivors
A few members of Faction Paradox survived the end of the War. They fought American Freemasons for control of history at King George III's mammoth hunt. (COMIC: Political Animals)

While several Time Lords survived the War, (PROSE: The Galifrey Chronicles, Timeless) the universe at large was only aware of four surviving elementals. (PROSE: The Adventuress of Henrietta Street, Trading Futures) These were blamed for causing the mysterious disaster that drained the universe of energy, (COMIC: Miranda) and they ruled the universe as the Imperial Family. (PROSE: Father Time)

Participants
It was suggested that the War was allowed to escalate out of all proportion and the real threat to Gallifrey came from within. (PROSE: Warlords of Utopia) Indeed, the Houses of Gallifey were not above in-fighting, especially the ruling six: Mirraflex, Xianthellipse, Arpexia, Dvora, Tracolix and Lineacrux. (PROSE: The Book of the War) It was House Lolita, though, which most ruthlessly pursued its own interests. (AUDIO: The Shadow Play, In the Year of the Cat)

Although the conflict was primarily between the Time Lords and the enemy, other powers became heavily involved as they sought to either evade or exploit the War.

Faction Paradox's stance proved the most opportunistic and changeable. At times they over-ambitiously launched direct attacks on the Time Lords (PROSE: The Book of the War), at times attempted more subtle subversion of their activities (PROSE: Interference - Book One) and eventually found themselves negotiating to be reinstated as a House of Gallifrey. (AUDIO: The Shadow Play)

The Remote were perhaps even more unpredictable; their anarchistic nature utterly committed them to the overthrow of whichever the dominant power was at any given time. They were also unbound from linearity, resulting in Remote members like Compassion interacting with people from before the start of the War.

Various posthuman groups allied themselves with the enemy.

Grandfather Halfling often left the City of the Saved to participate in the War.

From what they assumed was the safe vantage point of non-existence, the Celestis treated the War as a game, sometimes interfering on the Homeworld's behalf and sometimes supplying the enemy with weaponry. (PROSE: The Book of the War)

Technology and development
Time Lords from a later stage of 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 utilised by Time Lords on missions. (PROSE: Alien Bodies, The Taking of Planet 5)

The Book of the War purported to be an encyclopedia of the War's first fifty years, (PROSE: The Book of the War) but others held that history books were anachronisms, since the forces that shaped the universe were inconceivable. (PROSE: Warlords of Utopia)

Naming

 * The War: In Alien Bodies, the conflict between the Time Lords and their enemy was introduced as just "the war", without any capitalisation. This lowercase improper title was used until The Ancestor Cell, which first called it "the War"; this title was later used heavily in the Faction Paradox series.
 * The War in Heaven: Alien Bodies introduced an alternate title for the War, saying, "The off-worlders liked to think of it as a War in Heaven, all hellfire and thunder." This was echoed by a brief mention of the phrase in The Book of the War and in several later novels, as well as the publisher's summary for The Eleven Day Empire and a note in the comic Bêtes Noires & Dark Horses. Indeed, all later Mad Norwegian Press Faction Paradox novels included a preface identifying "The War" as "A conflict so primal that for most of the population of history, it can only be thought of as a 'War in Heaven'," a sentiment which was echoed in the background information given in Political Animals. However, with the exception of a single uncapitalised mention in PROSE: The Brakespeare Voyage, the Obverse-published Faction Paradox stories have referred to the conflict as only "the War". (That said, the title was referenced in Obverse's Iris Wildthyme short story Michael Drake, where Iris Wildthyme drunkenly tried to clarify which War she's talking about by saying that it's either in Devon or in Heaven.)
 * The Second War in Heaven: The Book of the War used the phrase "War in Heaven" to describe the War, but it also stated that the Eternal War was "the first great War in Heaven." Later, the book mentioned that some Homeworlders speculated that "only some kind of outside corruption could result in a Second War in Heaven". However, the title "the Second War in Heaven" was specifically never applied to the Houses' current war, and the next sentences immediately discredited the Homeworlders' theory and, with it, the "Second War in Heaven" appellate.