The Death Star was conceived during the period leading up to the Clone Wars, 24 years before the Battle of Yavin.

With the Republic and the Separatists fully at war known as the Clone Wars, Count Dooku, leader of the Separatist faction, must keep the plans a secret as to not fall into the hands of the Republic and the Jedi.

With the Separatists defeated along with the rise of the Sith and the destruction of the Jedi by means of Order 66, Emperor Palpatine and his apprentice Darth Vader launch the beginning of construction of the Death Star.

To demonstrate the full power of the Death Star, Grand Moff Tarkin orders the destruction of a rebel affiliated planet, Alderaan, as a show of power over the captive princess Leia

With the Rebellion fully formed and the training of Luke Skywalker underway, Skywalker and a squadron from the Rebel Fleet lead an attack on the Death Star, and scoring a victory by destroying it.

The Empire suffering a devastating blow, the Emperor orders the rapid construction of an already pre-constructed Death Star, dubbed Death Star II.

With the construction of Death Star II underway, the Empire deploy heavier assault ships in larger quantity's along with Vader's personal warship the Executioner.

With the location of the Death Star II now known to the Rebel Alliance, the Rebels move into to attack the seemingly vulnerable Death Star II, only to fall into a trap layed by the Emperor.

Luke Skywalker once again gains victory for the Rebels, defeating both the Emperor and Vader, the young hero escapes the Death Star II right before it's destruction, bringing in a new era of peace not knowing a new evil is coming their way.