Cyber-Sontaran War (The Doctor's Unvierse)

The Cyber-Sontaran war was a war that plagued the universe after the destruction of The Finale Dalek Empire.

After the removal of the Daleks from existence The Cybermen and Sontarans fought for control of the universe, they lead various battles through a long fought campaign.

Battle of New Mondas
After establishing a new capitol on Marinus and expelling the Voord the Cybermen of Marinus combined their technology with the Voord's and renamed the world as New Mondas, The Sontarans landed on the world without knowing The Cybermen were there, this is long to be believed as the first battle of the war, The Sontarans won destroying The Cybermen-Voord hybrids in the process, causing The Cybermen to launch a war on the Sontarans.

Battle of Pandora
The Sontarans had established themselves on the planet Pandora after their conflict with the Rutans destroyed Sontar, The Cybermen invaded with full force, occupying the planet and killing half the Sontaran war machine in one fell swoop, this crippled The Sontarans and forced them to search for new cloning worlds.

Rassilon's Takeover and The Battle of Metron III
The Cyber Controller was killed and replaced by Rassilon after he lost his power over Gallifrey, he was granted this via a mysterious Omniversal force known as The Overlords.

Rassilon soon took over the Territory Metron III from The Time Lords and established a base, when trying to convert the populace it failed to a large degree, Rassilon moved the majority of the Cyber forces to fight The Sixth Empire who had recently joined the war on it's own side.

The Invasion of The Sense Sphere:
The Doctor, K9 Mark II and The Rani would be sent to Metron by the high council to destroy a portal leading to Gallifrey on the world, there they faced Rassilon and defeated him, he fled to The Sense Sphere, invading and conquering The region, converting some Sensorites and committing others to slavery. If any refused they would be sentenced to death.

There, Rassilon came up with a plan to regain control of Gallifrey and combine The Cybermen and Time Lords into Cyberlords.

The Battle of Gallifrey and The Near Destruction of Time:
After killing Romana, forcing her to regenerate Rassilon imprisoned her and forced himself to regenerate, making himself look identical to Romana.

He would use his powers as Romana to reorganize Gallifrey to his side secretly and get the fourth, third, second, and fifth incarnations of The Doctor together along with The Fith's companions Tegan and Nyssa.

While this was happening The First Doctor had landed on Epsilon III with his companions Ian, Barbara, and Susan. There he accidentally met Peri Brown who was visiting at the same time as them with The Sixth Doctor, Cybermen soon invaded the station and the six escaped in the Sixth Doctor's Tardis, heading to Gallifrey.

The Sixth Doctor would soon use the self destruct on the station after escaping in The First Doctor's Tardis with an alien woman named Eleos.

The Tenth Doctor and his Eleventh Incarnation as well as companion Amy Pond found each other on Marinus, realizing time was breaking down they decided to go to Gallifrey.

In 1942 Clara Oswald was kidnapped by a cult and The Twelfth Doctor met the Thirteenth Doctor, they were attacked by Time Reapers which had just been released by Rassilon. The Two escaped in the Thirteenth Doctor's Tardis.

The Seventh Doctor and Ace arrived in 1942 and found Clara, freeing her and are taken away by a purple portal.

Meanwhile on Gallifrey, Tegan and Nyssa appear with the real Romana causing the four Doctors to flee after a scuffle with Rassilon, after hearing Rassilon's full plans to achieve absolute power they split up with everybody but the second and third doctor's leaving the planet..

The Second and Third Doctor's manage to stop the reapers from tearing through time by trapping them in the Death Zone, they accidentally freed several creatures from The Death Zone when doing so however.

The Tenth, Eleventh, Twelfth, First, and Thirteenth Doctor's land with their companions, The Thirteenth is brought with the companions to the Conversion area while the other Doctor's escape the clutches of The Cybermen.

Peri, Amy, Ian, Barbara, Susan, and The Thirteenth Doctor escape in her Tardis as the First, Tenth, Eleventh, and Twelfth Doctor's encounter the Second and Third.

The Doctors, now together, share their information through a telepathic link, suddenly all the others arrive and all the companions except Romana are sent to The First Doctor's Tardis, Romana and The Doctor's head back in the Thirteenth Doctor's Tardis.

Rassilon appears in the panopticon after securing The Matrix with his Cyber forces, the politicians are forcefully brought in by Cybermen, The Doctors and Romana appeared revealing they'd contacted thousands of different armies including The Sontarans, and that Rassilon should flee with his Cyber army or die trying.

Rassilon escaped though just narrowly, fighting off every attacker. The Doctor's soon realized he'd left a bomb for them with a Tardis Matrix controlling it, The Thirteenth Doctor's Tardis switched places with the bomb, unable to return back.

The First Imperial Crusade
The Sixth Empire had previously lost their homeworld to The Cybermen. The Sixth Empire sent half their forces to their homeworld and were all annihilated quickly by the stationed Cyber Legion.

The Sontaran assault on the Thirteenth Moon of Omega
After rebuilding their forces the Sontarans attacked a front line Cyberman moon, this assault managed to cut off a large amount of the Cybermen's supply line, forcing them to find a new more dangerous route.

Rassilon's Plan and The Attack of Zeta Minor
Rassilon came up with a plan to use Anti Matter Properties to erase the Sontarans and all their other foes from existence. So he sent a fleet to Zeta-Minor which was now controlled by The Time Lords for research purposes. All but one Time Lord ship was destroyed in the battle. The last Time Lord managed to report to the high council which allowed for a formal declaration of war to begin.

Destruction of Zeta Minor
The Time Lords sent the Celestial Intervention Agency to destroy the planet, it succeeded narrowly with all the agents sent dying.

Assault on Arkanos IV
Rassilon who was now part Cyberman helped the Thirteenth, Fourteenth, and Fifteenth Cyber Legions take the largest Sontaran cloning world which was once known as Arkanos IV.

The battle lasted months on end, with neither side gaining any ground, it got to a point where eventually all Cyber 52 Legions and all 62 Sontaran Battle Groups were fighting for the control of one planet.

The Sixth Empire joined the conflict to try and destroy the weakening factions though they were quickly obliterated and removed from the overall conflict all together.

The Time Lords, wanting to stop this war from becoming as bad as The Last Great Time War, sent their own forces to try and get the Cybermen or the Sontarans to pull out of the world, the forces that were sent were quickly demolished. This is when the Shadow Proclamation launched an investigation into what had destroyed the armies, apparently The Sontarans had developed a new canon that could obliterate humanoids, Since the Cybermen had already upgraded themselves past the point of it being damaging to them the Sontarans used it on other attacking forces.

The Cybermen decided to eventually pull out of Arkanos IV, instead detonating the third moon and causing it's debris to destroy the major cloning city on the world.

The Sontarans were mostly away from the city on the front lines at that point and decided to sent their space fleet to attack the leaving Cyber Fleet.

The Cybermen had their forces split in two, each escaping to different sides of the local galaxy.

The battle was a unfortunate pyrrhic victory for the Sontarans.

Proxy Wars:
The Sontarans and Cybermen stopped engaging in direct conflict, instead installing secret proxy wars across the universe, which brought several new factions into the war, notably the Draconians, The Ogrons, and The Voord would fight with the Sensorites, The Ood, The Ice Warriors, and The Dominators. This would weaken them up enough for them to begin to be picked of and in the case of the Cybermen, absorbed into their ranks.

Clone Wars
The Sontarans begin cloning other races to battle the Cybermen, with their ultimate plan being cloning The Doctor to lead their armies into battle.

This plan would work temporarily though The real Doctor managed to imprison the fake Doctor. and defeat the Sontaran army.

The Shadow Men
The Cybermen and Sontarans would meet on Lespon VI for one massive battle, The Doctor would arrive after hearing reports of mysterious shadow figures around the world.

The Doctor spotted these shadow people, the planet nearby vanished into white as did all the combatants. The Doctor fled to Gallifrey where The High Council had set up a defence shield, the universe was being erased as were all other universes within their multiverse. The Shadow People otherwise known as The Overlords would try to topple Gallifrey, the president managed to send The Doctor away to another Multiverse within her Tardis while they were all destroyed.