Alliance

An alliance was made up of people and groups working together. (TV: The Pandorica Opens)

Alliances
Rassilon led the Alliance of Races against the Hyperions and other species. (COMIC: Terrorformer, Gangland)

The Pandorica Alliance, (PROSE: The Monster Vault) described by River Song as "everything that ever hated" the Doctor, were a gathering of numerous species whose combined fleets came to Earth in 102, where their representatives saw that the Eleventh Doctor was sealed within the Pandorica; believing him to be the cause of the cracks in time that were endangering the universe, the Alliance sought to contain him in order to save reality. (TV: The Pandorica Opens) However, the Alliance failed to realise that the cracks were caused by the destruction of the Doctor's TARDIS, resulting in a total event collapse which all but wiped them from history, leaving only stone after images before the Doctor performed Big Bang Two to restore the universe. (TV: The Big Bang)

In 1928, the families of Ablemarch, Costerdane and Frines made an alliance to acquire Jack Harkness' immortality, becoming the Three Families. (TV: End of the Road)

The Alliance of Shades was an organisation created to hide alien secrets from humanity since at least the 1950s. They used the android Men in Black as agents. (TV: Dreamland, TV: The Vault of Secrets)

In their attempt to invade the universe, the Kasaavin allied with the Renegade Time Lord known as and the human Daniel Barton. (TV: Spyfall)

In the 21st century, Captain Jack Harkness told Graham O'Brien, Yasmin Khan and Ryan Sinclair that the Alliance sent the Cyberium back through time and space in an attempt to ensure the final death of the Cyber-Empire. (TV: Fugitive of the Judoon)

The Uvodni were part of a Planetary Alliance that fought the Malakh in the Ghost Wars of the Horsehead Nebula. When other allied worlds had been crushed by the Malakh Empire, the Uvodni continued to fight until an armistice was signed in the late 1990s. (TV: Warriors of Kudlak)

The Thirteenth Doctor warned the Grand Serpent that she had seen "a lot" of species make alliances with the Sontarans and that it never ended well. In anticipation of the final Flux event, the Sontarans, represented by Commander Stenck, offered "the three-fingered hand of uneasy alliance" to the universe, calling for a truce with their rivals, the Daleks and the Cybermen, but excluding their long-standing enemies, the Rutans. In reality, the Sontarans had only offered a truce to their rivals as a ploy to lure their space fleets into being destroyed by the Flux. (TV: The Vanquishers)

The Alliance was a defensive organisation created in the 22nd century, after the 2150s Dalek invasion of Earth. (PROSE: Original Sin, PROSE: Lords of the Storm)

The Alliance were a band of races who were led by the Fifth Doctor as the Supreme Co-ordinator or "Supremo" on behalf of the Time Lords in a war against Morbius. (PROSE: Warmonger)

The Cyrrhenic Alliance, also known as the Alliance, was a group of aligned planets, including Levithia and Ribos that fought in the Alliance Wars. (TV: The Ribos Operation)

The Earth Alliance was a political entity, centred on Earth, that was formed by the 22nd century and became the dominant form of human government in the Mutter's Spiral from at least the 36th century to several centuries later. It was a more loose alliance of human colonies against common threats than the earlier and more politically integrated Earth Empire. (AUDIO: The Sirens of Time, Invasion of the Daleks)

The Galactic Alliance was represented by Ambassador Rahnius, as well as undercover agents Bill and Bott. (TV: From Raxacoricofallapatorius with Love, PROSE: Martha in the Mirror)

In 4000, the Daleks assembled a Great Alliance with representatives of the Outer Galaxies to invade the solar system. However, the Outer Galaxies were betrayed by the Daleks. (TV: Mission to the Unknown, The Daleks' Master Plan)

In the 51st century, the Icelandic Alliance and the Supreme Alliance fought World War VI on Earth. (TV: The Talons of Weng-Chiang, PROSE: Emotional Chemistry, Under Reykjavik)

The Raxas Alliance was composed of the planets Raxacoricofallapatorius, Clom, Clix and Raxacoricovarlonpatorius. (TV: The Gift, COMIC: Doctormania)

In the year 200,100, the New American Alliance existed on Earth when the planet was ravaged by the Daleks. (TV: The Parting of the Ways)

When the Cybermen of the cyber-web invaded the Federation universe, they formed an alliance with the Borg Collective. Though the Borg-Cyberman Alliance was initially successful, both sides sought to upend and dominate the other faction, the Cybermen succeeding when they detected the Doctor's TARDIS aboard the USS Enterprise. To survive the Borg formed an alliance with the Eleventh Doctor and the Enterprise crew, the combined force destroying the Cybermen. (COMIC: Assimilation²)

In the mythology of an alternate Skaro, the Kaleds and Thals were said to have formed an alliance against the Time Lords, who sought to destroy the developing society, wiping out the invaders. (AUDIO: Palindrome) In The Warrior's universe, the races of Skaro formed the Unified Skaroan Alliance after discovering the Fourth Doctor's Time Ring, unifying against the Time Lords for what they saw as an unprovoked alien attack. (AUDIO: Aftershocks) In the Unbound Universe, Davros formed an alliance with the Quatch to attack Skaro, forcing the Thals and Daleks to form an alliance to defend their home. Following the defeat of the Quatch, Alistair Gordon Lethbridge-Stewart chose to stay behind on Skaro to ensure that this alliance remained. (AUDIO: Masters of War)

Last Great Time War
During the Last Great Time War between the Time Lords and the Dalek Empire, both sides refused to ally themselves with the Sontaran Empire, purposefully excluding the Sontarans from the conflict despite their efforts to join. (AUDIO: The Eternity Cage)

Initially the Time Lords were allied with the Temporal Powers, many of whom had been attacked by the Daleks prior to the War’s official start. (AUDIO: Desperate Measures) These powers, including the Monans and Phaidons, suffered great losses during the War, with the last of their battleships left amongst ruins on Karn. (AUDIO: Light the Flame) Over time the Time Lords became more ruthless in recruiting allies. After coming to power, Rassilon decreed that anyone who refused to help Gallifrey’s war effort was to be considered an enemy. (AUDIO: Havoc) One of Gallifrey's neighbours, Raeve, did refuse an alliance and as a result was targeted by Time Lord terrorist attacks. (AUDIO: A Heart on Both Sides) Seeing that they shared a common enemy in the Dalek Empire, the Time Lords actively sought an alliance with the Cybermen. (PROSE: Dalek Combat Training Manual)

Though the Time Strategist once claimed the Daleks did not require alliances, stating as such when it declined an alliance with Sontaran General Fesk, (AUDIO: The Eternity Cage) the Daleks made a number of alliances, with the Squire recalling that they led an "axis of dark powers" in the War. (COMIC: Pull to Open) The Daleks made alliances with the Taalyens, (AUDIO: The Innocent) the Cyclors, (COMIC: The Organ Grinder) and the Morlontoa. (COMIC: The Clockwise War) They also deployed the "full might" of the Deathsmiths of Goth. (PROSE: Meet the Doctor) The Daleks made use of an ambassador, Lady Sumultu, in order to gain access through a gateway to the Stagnant Protocol, using a potential alliance as a front so they could invade. (AUDIO: Unfinished Business)

Failed alliances
In 2007, the Cybermen of Pete's World proposed an alliance with the Daleks, represented by the Cult of Skaro, claiming that their combined powers could "upgrade the universe." The Daleks, however, quickly denied this request, leading to immediate hostilities in the Battle of Canary Wharf. (TV: Doomsday)

Vince Foster attempted to forge an alliance with a Dalek only for it to exterminate him once its power was restored. (AUDIO: The Lights of Skaro)

During the Kotturuh crisis, the Dalek Restoration Empire attempted to form an alliance with the Hond only to be rejected, forcing the Daleks to seek out the Doctor for aid against the Hond. (COMIC: Defender of the Daleks)

During the Last Great Time War, Rassilon sought an alliance with the Nestene Consciousness, asking it forge an Auton of the War Doctor to lead troops on a suicide mission only to learn that the genuine War Doctor had won over the Consciousness and subverted their alliance. (PROSE: Decoy)

After being overthrown, Rassilon allied with the Cyberiad to conquer Gallifrey only for his allies to betray him, forcing Rassilon to align with the Twelfth Doctor to defeat the Cybermen. (COMIC: Supermacy of the Cybermen)