Dalek Empire

The Dalek Empire was a time and space-spanning empire created by the Daleks.

Origins
The Empire was formed during an unknown period in Dalek history, presumably after venturing into space from their home planet of Skaro. Events from this period may have included the initial attacks on Earth. (TV: The Dalek Invasion of Earth)

As the Daleks started understanding the abilities of their enemy the Doctor, they focused their efforts on creating their own means of time travel, eventually creating their own time machines. They attempted to hunt down the Doctor through time and space, but failed when the Doctor caught them in a rivalry with the Mechanoids. (TV: The Chase)

Expanding the Empire

 * As always, time travel makes the sequence of events here conjectural.

Settling down to more general use of their time travelling abilities, the Daleks proceeded on a grand effort to create a permanent base of operations. Using knowledge from the library of Kar-Charrat and the power of Gallifrey, the Daleks obliterated the entire Seriphia Galaxy, remaking it to their own designs. From there, the Daleks staged several major invasions of the Mutter's Spiral, notably in the 42nd and 67th centuries. (AUDIO: Dalek Empire)

Despite having their own galaxy, the Dalek Emperor maintained himself on the home planet of Skaro, and continued efforts from there to take over Earth at various points in history. (TV: The Daleks' Master Plan, The Evil of the Daleks, Day of the Daleks)

At some point the Daleks' creator Davros was re-animated (TV: Destiny of the Daleks) and returned to lead the Daleks, taking the role of Emperor for himself. (TV: Resurrection of the Daleks) A schism developed between the Imperial Daleks loyal to Davros and Renegade Daleks loyal to the Dalek Supreme. The subsequent Imperial-Renegade Dalek Civil War stretched across the entire Dalek Empire. Even as they waged war with each other, the Seventh Doctor seemed to have opposed and defeated both factions. (TV: Remembrance of the Daleks)

The Dalek Prime and Davros survived the war and encountered one another once more during a decline in Dalek pervasiveness throughout the galaxy. Davros was again defeated and the Dalek Prime set about rebuilding the Empire. (PROSE: War of the Daleks)

Last Great Time War and aftermath
United and re-unified once more, the Daleks, including Davros (TV: Journey's End) and a new Dalek Emperor (TV: Bad Wolf) fought the Time Lords in the Last Great Time War, a titanic battle across all of history, resulting in the near-total destruction of both sides. (TV: Dalek) It was eventually revealed that led by the War, Tenth and Eleventh Doctors, all thirteen incarnations of the Doctor came together to save the Time Lords and Gallifrey which was under attack by the entire empire, a billion billion Daleks in millions of ships. When the Doctor moved Gallifrey into a pocket universe, the Daleks were caught in their own crossfire and they destroyed themselves rather than being destroyed along with the Time Lords by the War Doctor with the Moment as previously believed. (TV: The Day of the Doctor)

Several Daleks survived. A soldier that, according to the Ninth Doctor, "fell through time" and passed through alien collectors, survived. This Dalek self-destructed after taking on human emotions from absorbing Rose Tyler's DNA. (TV: Dalek) Many other Daleks actually survived the Last Great Time War, as the Cult of Skaro found the Genesis Ark, a Time Lord artefact and prison which seemingly kept its prisoners safe from the Doctor's effort to finally end the war. There were millions of Daleks in the Ark, but all were trapped in the Void by the Doctor and Rose Tyler though the Cult escaped through emergency temporal shift to 1930 Manhattan where they tried to rebuild the Dalek race and all but Dalek Caan were killed. (TV: Doomsday, Daleks in Manhattan, Evolution of the Daleks)

The Emperor, who built up a new army of Daleks from human genetic material, and unsuccessfully invaded Earth in the year 200,100. He and his army were destroyed by Rose Tyler as the Bad Wolf entity during the Battle of the Game Station. (TV: Bad Wolf / The Parting of the Ways)

The millions of insane Daleks on the Dalek Asylum planet also survived as they were kept imprisoned due to their mental state. They were later destroyed by the Daleks themselves with the help of the Eleventh Doctor, Amy Pond, Rory Williams and Oswin Oswald after the Daleks feared them getting out. (TV: Asylum of the Daleks)

Davros survived due to Dalek Caan time travelling into the Time War and rescuing him from the "jaws of the Nightmare Child" during the first year of the war. Davros was able to build a new empire but he and Dalek Caan were apparently killed when the new empire was destroyed by the Meta-Crisis Doctor. (TV: The Stolen Earth, Journey's End)

Further Dalek empires
The Cult of Skaro survived, consisting of Dalek Caan, Sec, Thay and Jast. An emergency temporal shift moved him to the early parts of the Last Great Time War, where he rescued Davros and brought him to the post-war reality. Once there, Davros swiftly constructed the New Dalek Empire by moving planets to the Medusa Cascade. (TV: The Stolen Earth, Journey's End) Following the destruction of this empire, the survivors located a Progenitor device, and tricked the Eleventh Doctor into verifying them as Daleks. The device then created five new Daleks, who destroyed their forebears and escaped through a time corridor to the 41st century, where they built yet another empire based on the New Dalek Paradigm. (TV: Victory of the Daleks)

One iteration of the Dalek Empire was overseen by a Parliament led by a Dalek Prime Minister. (TV: Asylum of the Daleks)

The Daleks at some point after a vast Galactic Recession established the Sunlight Worlds, 400 worlds and the planet Carthedia acting as a government state. Humans were allowed to live there, not knowing of the danger of the Daleks. The Dalek time controller planned to use the Cradle of the Gods to turn the Sunlight Worlds into copies of Skaro. However the Eleventh Doctor and Jenibeth Blakely foiled this plan. (PROSE: ''The Dalek Generation)

Alternate timelines
Following their escape, the new Daleks discovered the lost Time Lord artefact, the Eye of Time, allowing them to alter time as they saw fit. The Daleks returned to Skaro, rebuilt their capital city of Kaalann, appointed a new emperor, and began rebuilding their empire. One of the empire's first acts with their new-found power over time was to invade Earth in 1963. In this new timeline, they succeeded in killing every member of the human race. However, the Doctor and Amy Pond successfully undid these events, leaving Earth unconquered and erasing the new empire from existence. (GAME: City of the Daleks)

An alternate timeline created when guerrillas from this timeline travelled back and accidentally caused a war by assassinating delegates meant the Daleks invaded Earth. This was averted when the Third Doctor travelled back from this timeline and told the guerrilla responsible the truth. Daleks and Ogrons travelled back to keep this timeline intact, but the guerrilla destroyed them with a bomb (TV: ''Day of the Daleks)

In another alternate timeline, the Daleks invaded Earth in the 17th century. This was averted by the Eighth Doctor and Charley Pollard. (AUDIO: The Time of the Daleks)