- For the unrelated novel series, see Chronicles of the Shadow War.
The Shadow Wars are a fictional series of wars involving the Shadows in the television science fiction series Babylon 5. There have actually been many Shadow Wars since ancient times in the galaxy. Roughly every thousand years, the Shadows begin a new Shadow War to promote chaos in the universe in accordance with their ideology of growth through conflict. During the first two seasons, "The Shadow War" typically refers to the previous Shadow War in the cycle, a thousand years earlier. At this point the one that takes place within the series itself is referred to as "the Coming Shadow War", as it is anticipated but not yet begun. This last war is mainly referred to as "the Shadow War" in the fourth and fifth seasons.
First Shadow War 
In the "Shadow War" that occurred in the year 1260, the Shadows battled an alliance of races led by the Vorlons and Minbari. The use of Babylon 4, brought back in time from a thousand years in the future, was pivotal in the defeat of the Shadows. It is referred to by the Minbari as "The Great War".
Second Shadow War 
The final Shadow War occurred one thousand years later in 2260, in which the Shadows battled the combined forces of the Babylon 5, Minbari Federation, Narn Regime, the League of Non-Aligned Worlds, and the Vorlon Empire. The end of the war at Coriana 6 saw the return of the First Ones and their final departure – along with the Shadows and Vorlons – from the galaxy.