Mirror Universe

TheMirror Universe was an alternative timestream generated in 4 ABY when Luke Skywalker killed both Emperor Palpatine and Darth Vader.

Fall of the 1st Galactic Empire
In 4 ABY Luke Skywalker gave in to his anger and hatred, killing first Darth Vader and Emperor Palpatine then ordering the firing of the second Death Star's superlaser at the Rebel Alliance's flagship, Home One. Following this he traveled to Coruscant and declared himself Emperor via a live holonet transmission. Over the following three years he quietly engineered the fall of the Palpatine Regime, assassinating certain key figures such as Sate Prestage, Chiron Dunai and Kos MariK before finally, in a stunning move he decreed the Empire's reorginisation.

Rise of the 2nd Galactic Empire
By 14 ABY Emperor Skywalker had established the Second Galactic Empire and instituited radical reforms that allowed non-humans and females to serve in the Imperial military. the new Emperor recomissioned construction of the Venator-class Star Destroyer as the backbone of his new Imperial Navy.