Founding Conflict

The Founding Conflict was fought between the Time Lords and the Ravagers to bring an end to the Dark Times and anchor the structure of Time. The Ravager Swarm viewed it as an expression of a fundamental battle between Space and Time, with Gallifrey representing Space trying to take control of Time.

Origins
In the Dark Times, time ran wild and the Time Force wreaked havoc across the universe. (TV: Once, Upon Time)

Upon completing the Hand of Omega, Omega had declared to Rassilon and the Other that their people could use it to become the Lords of Time and impose their own order upon time. (PROSE: Remembrance of the Daleks) Rassilon ultimately decided to make the universe rational. (PROSE: So Vile a Sin)

Control of Time
In an event later recorded as the anchoring of the thread in The Book of the War, (PROSE: The Book of the War) the Time Lords imposed their control on Time. They bound its flow to the artifical planet Time and through six Mouri located in the Temple of Atropos, whose wills would control the flow. (TV: Once, Upon Time) In doing so the entity that personified Time also became imprisoned on the planet. (TV: The Vanquishers) The Time Lords created the Web of Time, using the Eye of Harmony on Gallifrey as a "hitching post". (AUDIO: Neverland)

Two Ravagers, Swarm and Azure, who worshipped Time, (TV: The Vanquishers) believed what the Time Lords had done was heresy. They worked to overturn their order, which Swarm viewed as an extension of the fundamental conflict between space and time. (TV: Once, Upon Time)

Siege of Atropos
The final battle in the Founding Conflict was the Siege of Atropos, on the planet Time. After learning of the Temple, the two Ravagers had seized control of it, bringing five Passenger forms with them, each containing millions of hostages. They evicted the Mouri, allowing time to run wild.

A small group of members of the Division, including Karvanista and led by the Fugitive Doctor, were sent into the Temple to free the hostages and apprehend the Ravagers, with the Doctor demanding that the Ravagers call off their remaining forces. Swarm and Azure refused the ultimatum and disintegrated some of the hostages, but the Division had managed to replace one of their Passengers with a different one containing six Mouri; liberating themselves from the Passenger at a strategic moment, they re-anchored Time while Karvanista captured the two Ravagers. (TV: Once, Upon Time)