Khan Noonien Singh (Kelvin timeline)

"I will walk over your cold corpses."
 * - John Harrison to Starfleet personnel, 2259

Khan Noonien Singh (or simply, Khan) was a genetically engineered human (known as an Augment) created on Earth. He became infamous as one of the many tyrants who terrorized humanity during the Eugenics Wars.

During the 2250s, Khan was discovered, revived, and recruited by Starfleet Section 31 Admiral Alexander Marcus. He was given a new identity as "John Harrison", a English Starfleet Commander. He became angered by and later sought revenge on Starfleet.

Early Life
He was born in 1970. His mother was Doctor Sarina Kaur, the director of the Chrysalis Project from its foundation until her death on May 18, 1974. 

Ruler of the Earth
By 1992, Khan and his followers had seized control of over half the Earth. He fought with Vasily Hunyadi, the force behind the Serbian government. While a dictator, history would note Khan's empire was devoid of genocide and other such atrocities normally associated with similar forms of government. After the Eugenics Wars had been lost, Khan and his followers escaped aboard the sleeper ship SS.

Starfleet Service
The Botany Bay drifted in space until it was discovered sometime in the 2250s, following the destruction of Vulcan. Admiral of Section 31 brought Khan out of suspension, believing his savage intellect would be a prime asset. He forced Khan into working with him by threatening to kill his fellow Augments, and set him to work designing weapons and ships for Starfleet, including the Dreadnought-class USS Vengeance. Khan was recruited under the new identity of Commander John Harrison. 

Angered by Starfleet
At an unknown point in time, Harrison was angered by events related to Starfleet.

Vengeance (2259)
In 2259, Harrison attacked London. After his attacks on members of Starfleet, Captain James T. Kirk of the USS Enterprise made it his personal mission to track down and bring Harrison in. 

Appearances

 * Countdown to Darkness #4: "Number Four"
 * Star Trek Into Darkness - Benedict Cumberbatch